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Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Guha, S. R. D.
- A Brief History of Research and Training in Pulp and Paper in the Forest Research Institute, Dehra Dun
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Indian Forester, Vol 117, No 11 (1991), Pagination: 1009-1012Abstract
A brief history of papermaking, installation of first papermaking machine, raw material, research and training in pulp and paper in tbe Forest Research Institute, Dehra Dun bave been described in this paper.- Physico-chemical Changes in Hemicelluloses of Eucalyptus tereticornis during Sulphite Cooking of Holocellulose
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Indian Forester, Vol 111, No 2 (1985), Pagination: 99-106Abstract
Holocellulose from Eucalyptus Tereticornis were isolated by 5% potassium hydroxide, 16% potassium hydroxide and 24% potassium hydroxide + 4% boric acid in 14.8%, 84% and 5.3%, yield repectively. The main hemicellulose found to be present was xylan. Holocellulose from Eucalyptus Tereticornis was prepared and subjected to bisulphite pulping (pH 4.5-3.5 and pH 6.5-4.5) and neutral sulphite pH(8.5-6.5). Hemicellulose isolated by 5% potassium hydroxide from the residual holocellulose of sulphite cooks. Physico-chemical changes in henicelluloses were studied. It was observed that with the increase in Ph the retention of hemicellulose in residual holocellulose improved. But contrary to this, isolatable amount of hemicellulose decreased, particularly, xylan. Reasons for the same are discussed in the paper.- Prehydrolysis of Bamboo-effect of pH
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Indian Forester, Vol 108, No 5 (1982), Pagination: 342-353Abstract
Studies in this Paper have been carried out with a view to understand Ihe effect of pH on prehydrolysis of bamboo (Dendrocalamus strictus). The bamboo chips have been cooked with 1% H2SO4 H2O and 10% NaOH for 90 minutes and 150 minutes The acidic, aqueous and soda Lignins have been analysed These results show that pulp yield decreases at higher pH and at more cooking time, and is also effected by the final pH of the prehydrolysates. The lignin yield from prebydrolysate decreases as the pH goes towards acidic side. The methoxyl content in isolated lignins decrease with the increase of lignin yield, while total-OH increases with the increase in lignin yield. The ratio of syringaldehyde to vanillin is less in lignins Obtained at higher prehydrolysis time. The acidic and aqueous lignins are less condensed than soda lignin.- Studies on the Decay of Bamboo (Dendrocalamus strictus) during Outside Storage-degradation of Lignin
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bamboo is caused due to white rot type of fungal decay. The studies also showed that lignin macromolecule had chemically changed. The elemental analysis of the dioxane lignin isolated from fresh and stored (decayed) bamboo as well as the emperical formula for an average C9 or phenylpropane unit indicates variation in the nature of two lignins. The decayed lignins were higher in oxygen,lower in hydrogen, methoxyl value and carbon contents than of the sound bamboo lignin. The alkaline nitrobenzene oxidation of the decayed bamboo lignins gave lower yields of the main product, viz vanillin, syriagaldehyde and p-hydroxy-benzalhyde. In addition the molar ratio of syringaldehyde to vanillins(S/V) also increased which suggest the preferential degradation of the guaicyl units of the lignin during decay. Ultra violet studies carried out on decayed bamboo lignins show greater absorptions at 260 nm and 300 nm indicating changes in the lignin macromolecule.
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Indian Forester, Vol 107, No 1 (1981), Pagination: 54-59Abstract
During outside storage the bamboos (D. strictus) were attacked by various wood destroying microorganisms. The studies showed that like other major constituents lignin also progressively decreased due to decay as the storage period increased. This type of simultaneous depletion of the major constituents in woodbamboo is caused due to white rot type of fungal decay. The studies also showed that lignin macromolecule had chemically changed. The elemental analysis of the dioxane lignin isolated from fresh and stored (decayed) bamboo as well as the emperical formula for an average C9 or phenylpropane unit indicates variation in the nature of two lignins. The decayed lignins were higher in oxygen,lower in hydrogen, methoxyl value and carbon contents than of the sound bamboo lignin. The alkaline nitrobenzene oxidation of the decayed bamboo lignins gave lower yields of the main product, viz vanillin, syriagaldehyde and p-hydroxy-benzalhyde. In addition the molar ratio of syringaldehyde to vanillins(S/V) also increased which suggest the preferential degradation of the guaicyl units of the lignin during decay. Ultra violet studies carried out on decayed bamboo lignins show greater absorptions at 260 nm and 300 nm indicating changes in the lignin macromolecule.
- Chemical, Semi-chemical and Chemi-mechanical Pulps from Casuarina equisetifolia
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Indian Forester, Vol 107, No 3 (1981), Pagination: 174-177Abstract
Laboratory scale experiments on production of chemical (Kraft pulping) semi-chemical and Chemi-mechanical pulps are described in this paper. It is observed that pulps of satisfactory yield and strength properties could be obtained from the Casuarina equisetifolia similar to that of Eucalyptus grandis and Eucalyptus citriodora for wrapping paper, corrugating medium and core of the duplex boards.- Chemical Pulps for Writing and Printing Papers from Albizia moluccana
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Indian Forester, Vol 107, No 8 (1981), Pagination: 524-528Abstract
Laboratory experiments on production of chemical pulps from Albizia maluccana for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 0.98 mm and the average fibre diameter was 0.18 mm. Easy bleaching pulps in good yields with satisfactory strength properties could be prepared under suitable conditions of digestion. The investigation reported in this paper has shown that Albizia moluccana is a promising fibrous raw material for the manufacture of white writing and printing papers. For comparison results obtained from Albizia lebberk and Albizia procera are also included. This species is very similar to Albizia labbeck and Albizia procera investigated earlier in this laboratory.- Profection of Bamboo during Outside Storage - Prophylactic Treatment and its Economic Feasibility
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Indian Forester, Vol 106, No 6 (1980), Pagination: 437-440Abstract
Bamboo is generally stored in outside locations in wood based industries in our country. The storage period extends from a few weeks to about nine months. During this period the bamboo is attacked by various wood destroying organisms, it is believed that more than 20 per cent of it is destroyed during outdoor storage. Various chemical treatments have been suggested for controlling the decay in bamboo/wood during outdoor storage. The paper deals with the use of three cheap indigenous chemical preservatives for treatment of bamboo during outdoor storage for a period of twelve months. The economic feasibility of the treatment has also been discussed. The pentachlorophenate (Sodium Salt) was found to be most economical and effective.- Laboratory Experiments on Andhra Pradesh Hardwoods on Behalf of Bhadrachalam, Paper, Boards Ltd.
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Indian Forester, Vol 106, No 7 (1980), Pagination: 490-495Abstract
no abstract- Production of Kraft Paper from Bamboo (Melocanna baccifera) of Mizoram
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Indian Forester, Vol 106, No 8 (1980), Pagination: 578-582Abstract
The paper describes in detail of the investigations carried out on the production of unbleached and leached grades of pulps from Melocanna beccifera (Syn. Melocanna bambusoides) of Mizoram by sulphate process. Melocanna baccifera is a suitable fibrous raw material for paper making.- Utilisation of Cotton Stem and Cotton Waste for Board and Paper
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Indian Forester, Vol 105, No 1 (1979), Pagination: 57-67Abstract
India is all agricultural cenutry and the main crop beSides the cereals is cotton. In the three cotton growing tracts, there is a frasibility of setting up a small board or wrapping or writing and printing paper mill of inferior quality. In this investigation, production of board by lime procesn wrapping papers by soda or sulphate process and printing papers by alkaline processes have been described, Fibre characteristics as weJl as proximate chemical analysis have also been detailed. Pulping studies on hOsiery waste as well as cotton ginoing waste are also described.- Studies on the Decay of Bamboo (Dendrocalamus strictus) during Outside Storage-I. Effect of Preservatives II. Effect on Pulping Qualities
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Indian Forester, Vol 105, No 4 (1979), Pagination: 293-300Abstract
Bamboo is the main raw material used in the Pulp and Papar Industry in India. It is generally stored in onside locations for periods ranging from few weeks to a year. During storage it is estimated that about 20-25 percent of the raw material is deotroyed due to attack hy wood destroying organism in order to protect the bamboo from deterioration different preservations treatments were given to the baboo D. strietus which were stored for a peried of twelve months. Detailed chemical studies of the untreated and treated bamboos at the begianing and after storage periods of 4,8 and 12 momths were carried out. Mycological studies on the stored bamboos were also made during this period. The pulp yield and strength properties of the hand sheets prepared from stored bamboos Were also evaluated. The preservative treatment cut down the wood substance lossed by about 28-30 percent in a period of twelve months, while the pulp yietd losses were reduced by about 30 percent.- Studies on the Decay of Bamboo (Dendrooalamus striotus) during Outside Storage-degradation of Cellulose
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Indian Forester, Vol 105, No 6 (1979), Pagination: 444-450Abstract
Cellulose is a major constituent of wood and constitute approximately one half of the wood substance. It occurs in fibre walls both in crystalline and amorphous forms, and is always accompanied by other polysaccharides. The total polysaccharides being called holocellulose. During outside storage the bamboos were attacked by wood destroying fungi resultiag in the loss or both holocellulose and α-cellulose contents, and also a reduction in the degree of polymerization both in the preservative treated and in untrtated bamboos (controls). The loss of α-cellulose in pentachoro-phenate treated bamboo was about 24% after a 12 months storage period, while the untreated controls showed a loss of about 31% during the same period similarly the holocellulose content was also depleted more in the control bamboos than in the preservative treated bamboos. The degree of polymerization of both the α-cellulose and the holocelhlose decreased consideratory during the storage period in untreated bamboos. As the storage period increased the degree of polylnerizatinn of α-cellulose and bolocellulose decreased gradually indicating a possible random cleavage of the molecules by the cdorbohydrates secreted by the white rot and soft rot fungi which decayed the bamboo during their outside storage.- Straw-boards from Rajasthan Raw Material
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Indian Forester, Vol 105, No 8 (1979), Pagination: 571-572Abstract
Stem of Bajra (Pennistum typhoides), Bui (Kochia indica) and Khimp (Leptadenia pyrotechnica) were pulped by lime process for the production of straw boards on the laboratory scale. The strength properties of board sheets from all the raw materials meet the strength properties recommended by I.S.I.- Studies on the Chemical Composition of Sapindus mukorossi Gaerin
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Indian Forester, Vol 105, No 11 (1979), Pagination: 805-809Abstract
Proximate chemical analysis of the Kernel was carried out in order to obtain the basic information about the type of constituents present. This shows 35.9% crude oil &31.87% of crude protein. Crude oil was further purified and its physic chemical properties were determined. Constituent acids of the oil were identified as arachidic acid, stearic acid, palmitic acid and oleic acid. Behenic &lignoceric acids were identified as trace acids.- High Brightness Pulps as Filter for the Production of Urea formaldehyde & Melamine formaldehyde Moulding Powder
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Indian Forester, Vol 104, No 1 (1978), Pagination: 51-58Abstract
High brightness pulps suitable for use as Filler for Urea formaldehyde and Melamine formaldehyde moulding powder have been prepared from unbleached and bleacbed bamboo sulphates pulps of Central Pulp Mill, Fort Sondgarh by suitable bleaching process and from Eucalyptus hybrid wood by prehydrolysis sulphate process followed by multi stage bleaching process. These pulps were evaluated by Nuchem Plastics Ltd., Faridabad and fouod suitable.- Studies on the Chemical Composition of Salai Gum
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Indian Forester, Vol 104, No 3 (1978), Pagination: 174-181Abstract
The oleo gum resin from Salai (Boswellia serrata) COnsists of 23.5% gum, 55% oil and 55% resin. The gum portion mainly contains D.galactose (46.22%), D-arabinose (11.66%) and 4-D-methyl glucuronic acid alongwith minor quantities of D.mannose and D-xylose in the molecular architect. The gum on methylation and subsequent hydrolysis of methylated product yielded a complex mixture of O-methyl sugars. The main type of linkages in between galactose units were found to be 1→3 and 1→6.- Utilization of Hibiscus mutabilis. Linn. for Pulp and Paper
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Indian Forester, Vol 104, No 5 (1978), Pagination: 369-373Abstract
Hibiscus mutabilis was pulped by kraft process. High strength unbleached pulp can be produced from the debarked items in 40-50 per cent yield. Bark also produced pulp of good strength property but the yield was as low as 30%. Experimeat on Natural sulphite pulping process on debarked items produced pulp in 70% yield with light colour. The strength properties of the paper made from this pulp were comparable to kraft compared with normal bamboo kraft paper, except tearing strength all other properties were higher.- Corrugating Medium from Eucalyptus Hybrid
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Indian Forester, Vol 104, No 8 (1978), Pagination: 568-570Abstract
Eucalyptus hybrid (mainly E.tereticornis) was cooked by NSSC Process for the production of corrugated medium. The concentration of Na2 SO3 was varied from 8-15 per cent and the concentration of Na2CO3 was kept constant at 3 percent. The cooking temperatqre was varied from 162-170°C. Pu1p could be prepared in satisfactory yie1d and with adequate property for corrugating medium.- Pulping of Hibiscus sabdariffa Linn. (Roselle)
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Indian Forester, Vol 104, No 12 (1978), Pagination: 830-837Abstract
The paper reports The results on soda pulping of Hibisucus subdariffa Linn (Roselle), The average fibre length of bast fibre was 305 mm, fibre diameter-21.91 μ and cell wall thickness 5.6 μ The woody portion had an average fibre length of 0.799 mm, fibre diameter of 32.1 μ. And cell wall thickneso of 2.9 μ. Soda pulps in good yield and satisfactory properties could be prepared in laboratory. Pilot Plant scale trial confirmed laboratory finding. Pulping of bast fibre along, woody portion and whole plant indicated that yield of bast portion and woody portion was more or less same. The strength properties of bast pulp were higher.- Pulping of Anogeissus spp. and Tectona grandis (Lops and Tops) for Newsprint
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Indian Forester, Vol 103, No 3 (1977), Pagination: 196-202Abstract
Recently Nepa Paper Mills have installed cold soda plant with facilities far doing hot or semi hot pulping Tectona grandis and Anogeiseus spp. off Cuts as well as lops and tops will be available around Nepa Nagar for their expansion programme. With this end in view effect of concentration of chemicals, sulphidity, temperature and time. were investigated It was found that optimum conditions of pulping were 15% chemicals on o d basic Sulphidity and boiling for one hour. As the pulp of Anogeissus spp. was darker, it requ'red bleaching with 5% available chlorine. The pulps were mixed with 40% bleached Sulphate bamboo pillp have satisfactory strength properties for newsprint.- Evaluation of Softwoods viz., Cupressus lusitanica, Pinus radiata and Pinus patula for Paper Making
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Indian Forester, Vol 103, No 5 (1977), Pagination: 336-348Abstract
Laboratory scale, pilot plant acale and mill sCale trials on mixtures of three conifers viz., Cupressus lusilanica, Pinus patula and Pinus radiata grown in Kenya have been deacribed. The fibre length or the pulps were 1.90 mm., 3.05 mm and 2.82 mm respectively for C. lusitanica, P. radiala and p. patula. Pulps in satisfactory yield and strength properties should be prepared by the species separately as well as in lower tearing strength then the other species. Bleachability or pulps were good. Pilot plant scale trials and mill scale trials confirmed the laboratory results.- Kinetics and Mechanism of Periodate Oxidation of Glucuronoxylan
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Indian Forester, Vol 104, No 4 (1978), Pagination: 246-252Abstract
The kinetics or periodate oxidation of Bamboo hemicellulose (Glucuronoxylan) have been studied in aqueous solution at 30°C & pH 4. It is observed that oxidation of hemicellulose follows a first order kinetics with respect to periodate concentration and the rate of oxidation is directly proportional to hemicellulose concentration. In the present studies an attempt to establish the rate law and the probable course of oxidation reaction have been made.- Production of High Alpha Cellulose Pulp from Albizia amara, Acacia planifrons and Mixture of Hardwoods
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Indian Forester, Vol 102, No 3 (1976), Pagination: 191-196Abstract
High alpha cellulose pulps have been prepared from Albizia amara and Acacia planifrons and mixture of hardwoods compressing of Artocarpus sp., Dyera sp.,(Jilutong), Shorea sp. (red meranti) and Shorea sp. or Parashorea (meranti) by water-prehydrolysis sulphate process followed by multistage bleaching. These pulps could be considered for preparing various products like viscose rayon, tyre cord, nitrocellulose etc., provided these pulps pass further tests required.- Kraft Pulping of Sikkim Woods
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Indian Forester, Vol 102, No 8 (1976), Pagination: 518-525Abstract
The paper reports the results on sulphate pulping of four soft woods (viz., Larix griffithii, Abies spectabilis, Tsuga durnosa, Picea spinulosa) and two hardwoods (viz., Acer spp., Betula spp,) of Sikkim origin, as well as proximate analysis and fibre dimensions. The lignin content of the softwoods is higher than that of the hardwoods whereas holocelulose is lower as usual. When pulped individually under, identical conditions East Himalayan fir gave the best results amongst softwoods and Birch was found better in the case of hardwoods. Furnish obtained by blending the pulps of individual species and those obtained by cooking the mixture of all the species gave almost similar strength properties. The results have revealed that all these woods are suitable for manufacture of high strength kraft papers.- Pulping of Hardwoods from Maharashtra for Production of Packing Papers
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Indian Forester, Vol 102, No 12 (1976), Pagination: 885-889Abstract
The results of the investigation on the production of semichemical and kraft pulps as well as bleached kraft pulps for the manufacture of packiDg paper from a mixture of hardwoods from Maharastra are described. It is observed that pulps in satisfactory yield and strength properties can be obtained from mixed hardwood. growing in Eastern Maharashtra State by the cold soda process, neutral sulphite semichemical process and kraft process.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board - Part III.- Semt-chemical and Chemical Pulps from Lannea Grandis (Jhingan)
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Indian Forester, Vol 77, No 9 (1951), Pagination: 568-583Abstract
Laboratory experiments on the production of semi-chemical pulps from Lannea grandis (jhingan) suitable for wrapping papers by the neutral sulphite and soda semi-chemical processes are described. Semi-chemical pulps were also prepared by cooking a mixture of three species of hardwoods, viz., Lannea grandis, Boswellia serrata (salai) and Garuga pinnata (kharpat). High yields of pulps and the low consumption of chemicals are the advantages of the semichemical pulping process. Easy bleaching chemical pulps suitable for writing and printing papers have also been prepared from Lannea grandis.- Pulping of Illuk Grass (Imperata arundinacea) by Soda and Mono-sulphite Processes
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Indian Forester, Vol 77, No 10 (1951), Pagination: 651-660Abstract
At the request of the Ceylon Government, investigations were carried out at the Forest. Research Institute, Dehra Dun, on the pulping of illuk grass (Imperata arundinacea) by monosulphite and soda processes with a view to ascertaining the respective economies of the two processes. The sample of grass was supplied by the Ceylon Government. The investigations have disclosed that the cost of chemicals required for pulping of the grass by the mono-sulphite process is 38% more than that required by the soda process. Of the two methods of digestion, namely "overhead" and "fractional" as applicable to the soda process, "fractional" method of digestion appears to be more suitable as well as more economical for pulping of illuk grass.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board Part VI.-Writing And Printing Papers from Paper Mulberry (Broussonetia papyrifera )
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Indian Forester, Vol 78, No 2 (1952), Pagination: 93-99Abstract
Experiments conducted in Madras State and Travancore-Cochin State indicate that paper mulberry (Broussonetia papyrifera, Vent.) can be easily raised in plantations from seeds. The species reproduces itself naturally and is a fast grower and a good coppicer. The bast fibre is used in Japan for the preparation of extremely strong and high quality papers. Laboratory experiments as well as pilot plant trials carried out in this Branch indicated that the wood of this species is a useful raw material for the production of writing and printing papers. Since the chemical pulp from this wood is short-fibred, an addition of about 25% of long-fibred pulp such as bamboo pulp in the furnish improves the strength properties of the paper.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board. Part XV Chemical Pulps and Writing and Printing Papers from Albi la stipulata, Boivin
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Indian Forester, Vol 79, No 9 (1953), Pagination: 475-483Abstract
Laboratory experiments on the production of chemical pulps by the sulphate process from the wood of Albi ia stipulata are described. The wood was obtained from forests of Bihar. Results of four pilot plant experiments on the preparation of writing and printing papers from this wood are also included. This investigation has shown that chemical pulps in satisfactory yields can be prepared from this wood. The whiteness of the bleached pulps was good. Although the average fibre length of the pulps was only 1.02 mm., writing and printing papers made on the pilot plant from the furnish containing entirely the pulp from this wood were characterized by good strength properties. The formation of the papers was satisfactory. Two samples of papers - one writing and the other printing - are appended in this bulletin.- Chemical Pulps and Writing and Printing Papers from Chir (Pinus longifolia Roxb.)
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Indian Forester, Vol 84, No 4 (1958), Pagination: 235-240Abstract
Laboratory experiments on the sulphate pulping of chir (Pinus longifolia) are described. One pilot plant experiment is also described. The average fibre length of the pulp was 3.60 mm. and the average fibre diameter was 0.052 mm. Easy bleaching pulps in good yields were obtained. Printing paper made on the pilot plant was characterized by good formation and satisfactory strength properties. A sample of printing paper is appended to this bulletin.- Pressed Boards from Wattleiwood (Acacia mollissima, Willd.)
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Indian Forester, Vol 86, No 3 (1960), Pagination: 161-164Abstract
Laboratory experiments on the production of pressed boards by the Asplund defibration process from wattle wood (Acacia mollissima, Willd.) are described. Encouraging results were obtained.- Newsprint Grade Groundwood Pulp from Abies pindrow Royle (Silver Fir)
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Indian Forester, Vol 86, No 5 (1960), Pagination: 302-305Abstract
Laboratory experiments on the production of mechanical pulps from Abies pindrow (Silver fir) are described. Standard pulp sheets were made from 100 per cent mechanical pulp from this species and from a mixture of 70 per cent mechanical pulp and 30 per cent bleached bamboo chemical pulp. Strength properties of the standard sheets prepared from the mechanical pulp produced under suitable conditions have shown that this wood is a suitable raw material for the production of newsprint.- Chemical Pulps and Writing and Printing Papers from Sabai Grass (Eulaliopsis binata Retz.)
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Indian Forester, Vol 86, No 7 (1960), Pagination: 423-431Abstract
Laboratory experiments on the production of chemical pulps by the soda and sulphate processes from sabai grass (Eulaliopsis binata Retz.) are described. Results of experiments on the bleaching of sabai grass pulp are also included. Six pilot-plant trials on the preparation of writing and printing papers from this grass are described. Three samples of printing papers made from sabai grass are appended to this publication.- Chemical Pulps for Kraft Papers from a Mixture of Conifers
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Indian Forester, Vol 86, No 9 (1960), Pagination: 563-565Abstract
Laboratory experiments on the pulping of a mixture of conifers from the Punjab by the sulphate process for the manufacture of unbleached and bleached kraft papers are described. Encouraging results were obtained.- Chemical Pulps for Writing and Printing Papers from Albi ia procera Benth. (White Siris)
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Indian Forester, Vol 87, No 2 (1961), Pagination: 124-126Abstract
Laboratory experiments on production of chemical pulps from Albi ia procera Benth. (white siris) for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 0.90 mm. and the average fibre diameter was 0.021 mm. Easy bleaching pulps in good yields with satisfactory strength properties could be prepared under suitable conditions of digestion. The investigation reported in this paper has shown that Albi ia procera is a promising fibrous raw material for the manufacture of white writing and printing papers. The results of these experiments require to be confirmed by pilot-plant trials.- Chemical Pulps for Wrapping Papers from a Mixture of Broad-leaved Woods
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Indian Forester, Vol 87, No 3 (1961), Pagination: 194-197Abstract
Laboratory experiments on the pulping of a mixture of woods of broad-leaved trees frnm Madhya Pradesh for the manufacture of wrapping paper by the sulphate process are described. Encouraging results were obtained.- Chemical Pulps for Writing and Printing Papers from Ailanthus excelsa Roxb
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Indian Forester, Vol 87, No 4 (1961), Pagination: 262-265Abstract
Laboratory experiments on the production of chemical pulps from Ailanthus excelsa suitable for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 1.33 mm. and the average fibre diameter was 0.035 mm. Easy bleaching pulps in good yields with satisfactory strength properties could be prepared under suitable conditions.- Chemical Pulps for Writing and Printing Papers from a Mixture of Broad-leaved Woods
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Indian Forester, Vol 87, No 7 (1961), Pagination: 431-433Abstract
Laboratory experiments on the pulping of mixture of broad-leaved woods from Madhya Pradesh for the manufacture of writing and printing papers by the sulphate process followed by multistage bleaching are described.- Newsprint Grade Groundwood Pulp from Butea monosperma (Palas)
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Indian Forester, Vol 87, No 9 (1961), Pagination: 546-550Abstract
Laboratory experiments on the production of mechanical pulps from Butea monosperma (palus) are described. Standard pulp sheets were made from 100 per cent mechanical pulp from this species and from a mixture of 60 per cent mechanical pulp and 40 per cent bleached bamboo chemical pulp. Strength properties of the standard sheets prepared from the mechanical pulp produced under suitable conditions have shown that this wood is a suitable raw material for the production of newsprint.- Chemical Pulps for Writing and Printing Papers from Eucalyptus citriodora
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Indian Forester, Vol 87, No 12 (1961), Pagination: 768-770Abstract
Laboratory experiments on production of chemical pulps from Eucalyptus citriodora for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 1.03 mm and the average fibre diameter was 0.014 mm. Easy bleaching pulps in good yield with satisfactory strength properties could not be prepared. The investigation reported in this paper has shown that the suitability of EucaLyptus citriodora as a fibrous raw matreial for the manufacture of white writing and printing papers will depend on raw material costs as the bleach consumption is high and yields are not quite good.- Chemical Pulps for Writing and Printing Papers from Morus alba
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Indian Forester, Vol 88, No 1 (1962), Pagination: 64-66Abstract
Laboratory experiments on production of chemical pulps from Morus alba for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 1.02 mm. and the average fibre diameter was 0.011 mm. Easy bleaching pulps in good yield with satisfactory strength properties could be prepared. The investigation reported in this paper has shown that Morus alba is a promising fibrous raw material for the manufacture of white writing Bnd printing papers.- Mechanical Pulp from Eucalyptus tereticornis
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Indian Forester, Vol 88, No 7 (1962), Pagination: 512-515Abstract
Laboratory experiments on the production of mechanical pulp from Eucalypltus tereticornis are described. Standard pulp sheets were made from a mixture of 60 per cent mechanical pulp from this species and 40 per cent imported bleached sulphate wood pulp. Strength properties of standard sheets prepared from mechanical pulp produced under suitable conditions are satisfactory for the production of newsprint but the colour is poor and cannot be easily bleached.- Pulps from Nal Grass by Mechano-chemical Process
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Indian Forester, Vol 89, No 2 (1963), Pagination: 126-127Abstract
No abstract- Chemical Pulps for Writing and Printing Papers from Casuarina Equisetifolia
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Indian Forester, Vol 89, No 5 (1963), Pagination: 365-367Abstract
Laboratory experiments on production of chemical pulps from Casuarina equisetifolia for writing and printing papers by sulphate process are described. The average fibre length of the pulp was 1.08 mm and the average fibre diameter was 0.011 mm. Easy bleaching pulps in good yield with satisfactory strength properties could be prepared. The investigation reported in this paper has shown that C. equisetifolia is a promising fibrous raw material for the manufacture of white writing and printing papers.- Mechanical Pulp from Eucalyptus ('M.H' Mysore origin)
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Indian Forester, Vol 90, No 3 (1964), Pagination: 179-181Abstract
Laboratory experiments on the production of mechanical pulp from Eucalyptus (M.H.) are described. Standard pulp sheets were made from this species and 40 per cent imported bleached sulphate wood pulp. Strength properties of standard sheets prepared from mechanical pulp produced under suitable conditions are satisfactory for the production of newsprint, but the colour is poor. Pulp of satisfactory colour for newsprint, can be obtained by bleaching with 10 per cent available chlorine.- Pilot-plant Production of Kraft Paper from a Mixture of Conifers
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Indian Forester, Vol 90, No 7 (1964), Pagination: 442-443Abstract
No abstract- Pilot-plant Production of Wrapping and Printing Papers from a Mixture of Hardwoods
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Indian Forester, Vol 90, No 11 (1964), Pagination: 755-757Abstract
No abstract- Pilot-plant Production of Writing and Printing Papers from Morus alba
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Indian Forester, Vol 90, No 2 (1964), Pagination: 119-121Abstract
No abstract- Comparison of the Pulping Qualities of Sound Kail and Fungus Attacked Kail
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Indian Forester, Vol 91, No 3 (1965), Pagination: 199-199Abstract
no abstract- Newsprint Grade Groundwood Pulps from Acer campbellii (Maple)
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Indian Forester, Vol 91, No 4 (1965), Pagination: 206-209Abstract
Laboratory experiments on the production of ground wood pulps from Acer campbelli (Maple), are described. Standard pulp sheets are made from 100 per cent ground wood pulp from this species and from a mixture of 60 per cent ground wood pulp and 40 percent imported bleached sulphate pulp. The strength properties and brightness of standard sheets prepared from the ground wood pulp under suitable conditions have shown that this wood is a suitable raw material for the production of groundwood pulp suitable for newsprint production.- Newsprint Grade Mechanical Pulps from Ailanthus grandis and Bucklandia Populnea
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Indian Forester, Vol 91, No 6 (1965), Pagination: 371-376Abstract
no abstract- Newsprint Grade Ground-wood Pulps from Alnus nepalensis
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Indian Forester, Vol 91, No 8 (1965), Pagination: 593-596Abstract
Laboratory Experiments on the production of ground-wood pulps from Alnus nepalensis are described. Standard pulp sheets are made from 100 per cent ground-wood pulp from this species and from a mixture of 60 per cent ground-wood pulp and 40 per cent imported bleached sulphate pulp. The strength properties and brightness of standard sheets prepared from the ground-wood pulp under suitable condition have shown that this wood is a suitable raw material for the production of ground-wood pulp suitable for newsprint production.- Production of Writing and Printing Papers from a Mixture of Nagaland Hardwoods
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Indian Forester, Vol 91, No 10 (1965), Pagination: 754-757Abstract
No abstract- Writing and Printing Paper from Melia azedarach Linn. (Persian Illac)
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Indian Forester, Vol 91, No 12 (1965), Pagination: 867-869Abstract
no abstract- Production of Writing and Printing Papers from a Mixture of Grasses Growing in Mechanised Plantations of Uttar Pradesh
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Indian Forester, Vol 92, No 3 (1966), Pagination: 184-185Abstract
no abstract- Writing and Printing Paper from Eucalyptus ('M.H.' Mysore Origin)
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Indian Forester, Vol 92, No 4 (1966), Pagination: 228-232Abstract
Laboratory experiments on the production of sulphate pulp from Eucalyptus (M.H.) are described. Strength properties of standard sheets prepared from bleached sulphate pulp under suitable conditions are satisfactory for the production of writing and printing papers. The results were confirmed by one pilot-plant trial.- Newsprint Grade Groundwood Pulps from Melia Azedarach Linn. (Persian lilac)
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Indian Forester, Vol 92, No 6 (1966), Pagination: 357-361Abstract
Laboratory experiments on the production of groundwood pulp from Melia azedarach, Linn. Are described. Standard pulp sheets were prepared from 100 per cent groundwood pulp from the species and from a mixture of 60 per cent groundwood pulp and 40 per cent imported bleached sulphate pulp. The rate of grinding is slow, energy consumption is high and the brightness of the mechanical pulp is poor. The strength properties are quite satisfactory. The wood is not suitable for the preparation of groundwood pulp for manufacture of newsprint.- Sulphate Pulping of Phyllostachys bambusoides
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Indian Forester, Vol 92, No 7 (1966), Pagination: 467-468Abstract
no abstract- Production of Mechanical Pulps from Stetrculiaalata and Cassia siamea
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Indian Forester, Vol 92, No 8 (1966), Pagination: 523-528Abstract
no abstract- Writing and Printing Papers from Cleistanthus collinus
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Indian Forester, Vol 92, No 9 (1966), Pagination: 576-580Abstract
no abstract- Chemical Pulps for Writing and Printing Papers from Ringal (Arundinaria Sp.)
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Indian Forester, Vol 92, No 10 (1966), Pagination: 634-636Abstract
Laboratory experiments on the production of chemical pulps from ringal (Arundinaria sp.) for production of writing and printing papers by sulphate process are described. The average fibre length of pulp was 1.01 mm and average fibre diameter was 11 microns. Easy bleaching pulps in satisfactory yields could be prepared under suitable conditions of digestion.- Chemical Pulps for Writing and Printing Papers from Guatemala grass (Tripsacum luxum Nash)
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Indian Forester, Vol 92, No 11 (1966), Pagination: 684-686Abstract
Laboratory experiments on the production of chemical pulps for writing and printing. Papers by Soda process from Guatemala grass (Tripsacum luxum Nash) are described. The average fibre length was 1.16 mm and the average fibre diameter was 0.010 mm. Easy bleaching pulps with satisfactory strength properties for production of writing and printing papers could be prepared under suitable conditions from this grass.- Chemical Pulps for Writing and Printing Papers from Eucalrptus robusta
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Indian Forester, Vol 91, No 5 (1965), Pagination: 294-296Abstract
Laboratory expeciments on the production of chemical pulps from Ecualyptus robusta for production of writing and printing papers by sulphate process are described. The average tiher length of the pulp was 0.90 mm and the average fibre diameter was 0.010 mm. Easy bleaching pulps in good yield and satisfactory strength properties could be prepared under suitable conditions of digestion.- Writing and Printing Papers from Bihar Grasses
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Indian Forester, Vol 93, No 1 (1967), Pagination: 19-21Abstract
no abstract- Chemical, Semichemical and Mechanical Pulps From Eucalyptus grandis
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Indian Forester, Vol 93, No 6 (1967), Pagination: 360-372Abstract
no abstract- Chemical Pulps for Writing and Printing Papers from Eucalrptus camaldulensis
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Indian Forester, Vol 94, No 2 (1968), Pagination: 191-193Abstract
Laboratory experiments on the production of chemical pulps from Eucalyptus camaldulensis for production of writing and printing papers by sulphate process are described. The average fibre length of the pulp was 0.66 mm and the average fibre diameter was 0.011 mm. Easy bleaching pulps could be prepared under suitable conditions of digestion. The strength properties were, however, poorer than most other hardwoods tested in this laboratory.- Grasses as Raw Material for Paper Making in India
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Indian Forester, Vol 94, No 3 (1968), Pagination: 268-272Abstract
This article deals with utilization of grasses as a paper making raw material. After discussing the essential factors to be considered for choosing a paper making raw material, the authors have traced the history or the introduction of sabai grass as a paper making raw material and described its use. They have then described the work done at the F.R.I., Dehra Dun, on use of other forest grasses for paper making.- Mechanical Pulps for Newsprint Grade Papers from Moringa pterycosperma
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Indian Forester, Vol 94, No 8 (1968), Pagination: 635-638Abstract
no abstract- Wrapping, Printing and Writing Paper from Taxodium mucronaium
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Indian Forester, Vol 93, No 5 (1967), Pagination: 300-304Abstract
no abstract- Neutral Sulphite Semi-chemical Pulps from Eucaltptus grandis
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Indian Forester, Vol 95, No 5 (1969), Pagination: 353-355Abstract
no abstract- Chemical Pulps Por Wrapping, and Writing Printing Papers and Semi-chemical Pulps for Strawboard Prom Stobilanthus Species
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Indian Forester, Vol 95, No 6 (1969), Pagination: 407-412Abstract
no abstract- Jute-stick Pulp for Strawboard by Lime Process
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Indian Forester, Vol 95, No 7 (1969), Pagination: 482-484Abstract
Laboratory experiments on the production of strawboards from Jute-sticks by lime process are described. The results show that lime pulps for strawboard can be made from Jute-sticks in good yield and satisfactory strength properties.- Summary of Investigations on the Suitability of Indigenous Beoadl-eaved Woods for Production of Sulphate Pulps for Writing and Printing Papers
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Indian Forester, Vol 95, No 8 (1969), Pagination: 579-590Abstract
no abstract- Utilisation of Cupressus cashmeriana for Production of Kraft Paper, Writing and Printing Paper and Newsprint
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Indian Forester, Vol 95, No 9 (1969), Pagination: 640-649Abstract
Proximate chemical analysis and fibre dimension of Cupressus cashmeriana have been recorded. Sulphate pulps, suitable for kraft paper have been prepared on a laboratory scale. Laboratory as well as pilot plant experiments for the production of writing and printing paper as well as newsprint grade paper have shown that these grades of paper can also be manufactured from Cupressus cashmeriana.- Lime Pulps from Arhar Sticks (Cajanus Sp.) and Jawar Stalks (Sorghum Sp.)
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Indian Forester, Vol 95, No 10 (1969), Pagination: 689-691Abstract
Laboratory experiments on the production of lime pulps suitable for strawboard manufacture from arhar sticks (Cajanus sp.) and jawar stalks (Sorghum sp.) are described. Arhar sticks give pulps of higher yield whereas the strength properties are better in the case of jawar pulps. The strength properties of board sheets in both the pulps are higher than prescribed in I.S.I. Standards for strawboards and the yields are in both cases higher than rice straw and wheat straw.- Writing, Printing and Wrapping Papers from Mixtures of Hardwoods from Maharashtra State
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Indian Forester, Vol 96, No 1 (1970), Pagination: 64-71Abstract
The paper gives the results of the work done on mixture of hardwoods of three different regions, Chanda, Ballarshah and North Dhulia of Maharashtra State. The results show that the chemical pulps can be made from these mixtures for writing, printing and wrapping papers.- Chemical, Semi-chemical and Mechanical Pulps from Crytomaria japonica Don.
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Indian Forester, Vol 96, No 2 (1970), Pagination: 141-152Abstract
no abstract- Pilot Plant Production of Wrapping Papers from a Mixture of Oaks
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Indian Forester, Vol 96, No 3 (1970), Pagination: 258-262Abstract
Pilot plant scale trials on manufacture of wrapping papers from a mixture of three species of Oaks, viz., Quercus semecarpifolia, Quercus dilatata and Quercus incana are described. Pilot plant scale trials confirm the laboratory results published earlier. The trials on beating indicate that beater equipped with basalt lava roll and basalt lava bed plate gives better results than beater equipped with phosphorbronze tackles on the roll. The results show that for the same freeness, the percentage of fibres retained on 48 mesh were higher and percentage of fines (passing through 150 mesh) were lower when beating was done with basalt lava roll and basalt lava bed plate.- Wrapping Paper from a Mixture of Hardwoods from Himachal Pradesh
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Indian Forester, Vol 96, No 4 (1970), Pagination: 328-331Abstract
Laboratory and pilot plant scale trials on the suitability of mixture of hardwoods for wrapping papers from the Northern Zone of India surveyed by the Pre-investment Survey of Forest Resources are described. The results indicate that this mixture requires some admixture of long fibre for smooth running of the machine.- Efeect of Age on Pulping Properties of Eucalyptus Hybrid (E. tereticornis)
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Indian Forester, Vol 96, No 5 (1970), Pagination: 361-365Abstract
The paper gives the details of work done on three years and six years old Eucalyptus hybrid (E. tereticornis of Mysore origin), grown in Kalanor Reserve Forest Plantation, in Haryana State. Woods were pulped by using different conditions for pulping and were bleached by multistage bleaching process. Wrapping, writing and printing paper made from pulps showed slight decrease in yields and strength properties with an increase in age of wood.- Eucalyptus torelliana as a Raw Material for Paper Pulp
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Indian Forester, Vol 96, No 7 (1970), Pagination: 530-534Abstract
Eucalyptus torelliana is one of the potential species of Eucalyptus suitable for being introduced in India for production of paper pulp. Results of laboratory scale studies on this raw material indicate that it is a promising raw material for production of sulphate pulp for wrapping papers and of bleached pulp for writing and printing papers.- Pulping of Andhra Pradesh Hardwoods
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Authors
S. R. D. Guha
,
G. M. Mathur
,
R. N. Madan
,
Krishan Kumar
,
G. C. Agarwal
,
Rajesu Pant
,
S. Rajendra Prasad
,
A. H. Shah
,
D. K. Tiwari
,
K. M. Mehta
Source
Indian Forester, Vol 96, No 9 (1970), Pagination: 691-696Abstract
Laboratory experiments on production of chemical pulps from individual six species of Andhra Pradesh hardwoods for wrapping papers by sulphate process are deacribed. Mixed pulping of these six species was also carried out. To confirm the laboratory reaults pilot plant trial was also undertaken. The investigation reported in this paper has shown that pulps in good yield and satisfactory strength properties could be prepared from these hardwood species.- Production of Newsprint Grade Paper from a Mixture of Mechanical Pulp from Eucalyptus hybrid and Soda Semi-chemical Pulp from Bagasse
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Indian Forester, Vol 96, No 10 (1970), Pagination: 732-739Abstract
Laboratory as well as pilot plant trials have been carried out on the production of newsprint grade paper from a mixture of mechanical pulp from Eucalyptus hybrid and soda semi-chemical pulp from bagasse. The results show that the newsprint produced in this manner compares very favourably with imported newsprint and Indian newsprint.- Chemical, Semi-chemical and Mechanical Pulps from Casuarina equisetifolia
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Indian Forester, Vol 96, No 11 (1970), Pagination: 830-840Abstract
Laboratory scale experiments on production of chemical, semi-chemical and mechanical pulps are described. Filot plant scale experiments were undertaken to confirm laboratory results of chemical pulps. The results indicate that Casnanna equisetifolia is a suitable raw material for the production of chemical and semi-chemical pulps. This raW material is not suitable for production af mechanical pulps as the energy consumption for grinding was high and the colour of the pulp was dark. Results on the blending of Casuarina pulp with bamboo pulp indicated that blending improves strength properties of bamboo pUlp. Casuarina pulp when beaten in different laboratory beaters, viz., Valley beater, Jokro beater and Lampen Mill indicated that tearing strength was highest when beaten in Valley beater. Pulp beaten in Lampen Mill gave highest bursting strength and tensile strength.- Pulping Studies of Agathis robusta
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Indian Forester, Vol 96, No 12 (1970), Pagination: 866-873Abstract
With the increase of standard of living in the country it is essential to produce different grades of pulps and papers for domestic consumption. To meet the production target, it is essential to produce more of fibrous raw materials especially long-fibre material. Agathis robusta is a fast-growing exotic conifer from Australia. Wrapping papers, writing and printing papers and rayon grade pulps have heen produced on the laboratory scale with encouraging results. Proximate chemical analysis of wood as well as of fibre dimensions and their distribution in the pulp have also been recorded. It is seen that this material is suitable for producing the various grades of pulps and papers enumerated above.- Production of Writing and Printing Papers from Prosopis juliflora
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Indian Forester, Vol 96, No 6 (1970), Pagination: 429-432Abstract
Proximate chemical analysis and fibre dimensions of Prosopis juliflora have been recarded. Bleached sulphate pulps have been prepared on the laboratory scale. Laboratory acale experiments were confirmed on pilot plant scale. Laboratory as well as pilot plant scale expetiments have shown that writing and printing papers can be produced by Prosopis juliflora. As the wood was very crooked difficulties were observed in chipping.- Newsprint Grade Refiner Ground Wood Pulp from Jute Sticks (Corchorus capsularis)
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Indian Forester, Vol 97, No 2 (1971), Pagination: 101-104Abstract
Laboratory experiments on the production of mechanical pulp from jute sticks by refiner groundwood process are described. Standard pulp-sheets were made from a mixture of 60 per cent mechanical pulp from jute sticks and 40 per cent bleached sulphate pulp. The strength properties and brightness of the standard-sheets made under suitable conditions have shown that jute sticks are an ideal raw material for the production of newsprint.- Kraft Pulping of Cupressus lusitanica and Araucaria bidwilli
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Indian Forester, Vol 97, No 9 (1971), Pagination: 542-546Abstract
With the increase in the standard of living in the country the consumption of packaging paper is on the increase. To meet the production targets it is essential to produce more of fibrous raw materials especially long-fibred material. Cupressus lusitanica and Arancaria bidwillI are fast growing exotics from Mexico and Australia respectively. Proximate chemical analysis of the woods as well as fibre dimensions and their distribution in the pulp have been recorded. Kraft wrapping papers have been produced on the laboratory scale from both these materials.- Pulping of Poplars
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Indian Forester, Vol 99, No 5 (1973), Pagination: 296-301Abstract
The results of pulping of Populus × euranmericana Cv. 'casale', I 488, Populus deltoides IC and Populus × euramericana Cv. 'Heidemlj' by sulphate process are described. The average fibre length of Populus 'casale' was 902.24 µ, of Populus deltoides was 952.32 µ, and of Populus 'Heidemij' was 885.12 µ, and the average fibre diameter was 22.768 µ, 23.626 µ, and 23.210 µ respectively. All the three poplars gave excellent yields (between 50% to 57% based on oven-dry chips) and excellent strength properties (between 6.6 km to 12.6 km breaking length). Silviculturally, Populus deltoides IC appears to be most promising for large scale propagation.- Production of Cable Insulation Paper from Pinus kesiya
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Indian Forester, Vol 99, No 7 (1973), Pagination: 431-435Abstract
The suitability of Pinus kesiya grown in Manipur has been investigated for the production of cable insulation paper. The average fibre length in thls species 2.28 mm and average diameter 0.0399 mm. Under the conditions studied at unbleached yield of 55.6 percent on oven-dry chips the breaking length was 8.22 km and tear factor was 148.5. The paper made on the pilot plant was evaluated for electrical properties. The electrical strength was comparable with imported paper. The conductivity of water extract and ash cOntent of the paper was, however, high. This was due to the hard-water used for the manuracture of paper.- Production of Writing Paper from a Mixture of Grasses from Andhra Pradesh
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Indian Forester, Vol 99, No 9 (1973), Pagination: 564-569Abstract
Laboratory and pilot plant scale trials on the production of writing paper from a mixture of grasses from Andbra Pradesb are described. The results indicate that the mixture requires some admixture of long fibre for smooth running of the machine.- Pulpnig of Date Palm Leaves Phoenix dactylifera
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Indian Forester, Vol 99, No 10 (1973), Pagination: 609-614Abstract
Results on pulping of date palm (Phoenix dactyliferaL.) rachis and leaflets by sulphate process are recorded. The results indicate that the average fibre length of rachis is 1.26 mm and of leaflets is 1.00 mm. The rachis give a good yield of pulp and satisfactory strength properties. The leaflets give low pulp yield. The rachis and the leaflets could be pulped together. The palm leaves tested were from Iraq.- Chemical Pulps for Writing and Printing Papers from Cymbopogon citratus (DC.) Stapf (West Indian Lemon Grass)
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Indian Forester, Vol 99, No 12 (1973), Pagination: 717-720Abstract
Laboratory experiments on the production of chemical pulps for writing and printing papers by soda process from Cymbopogon citratus (DC.) Stapf after extracting the essential oil are described. The average fibre length Was 0.94 mm and the average fibre diameter was 0.013 mm. Bleached pulps, only in lower yields and less strength properties than sabal grass could be prepared from this raw material.- Fibrous Raw Materials for the Indian Pulp, Paper and Board Industry
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Indian Forester, Vol 98, No 7 (1972), Pagination: 409-426Abstract
no abstract- Pulping Qualities of Eucalyptus 'Hybrid' Grown in U.P
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Indian Forester, Vol 99, No 6 (1973), Pagination: 349-351Abstract
Results of pulping qualities or Eucalyptus 'hybrid' (Mysore Gum. mostly E. tereticornis) grown in various localities or Uttar Pradesh are recorded. Attempts have also been made to study the effect of age, rate or growth and top, middle and bottom portion of the main bole on pulping qualities. The results indicate that Eucalyptus 'hybrid' grown in Taral and Bhabar Division, Barkot Range, Lachhlwala Range, Bijnor Plantation Division or in Shivalik Range is equally suitable ror pulp and papermaking. There is an indication that up to 9 years of age the strength properties of pulp improves. No significant difference was round in pulp quality when sample for different rate of growth and top, middle and bottom portion were pulped using same pulping conditions.- Suitability of Mikania mikrantha H.B.K. for Papermaking
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Indian Forester, Vol 100, No 1 (1974), Pagination: 28-30Abstract
The paper reports results of an investigation on tbe suitability of Mikaina micrantha for papermaking. Chemical pulps were obtained only in low yields and with low strength properties.- Fire Retardant Treatment of Paper
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Indian Forester, Vol 100, No 2 (1974), Pagination: 118-120Abstract
Results of all investigation on treatment of paper by deeping in different fire retardant formulations are reported. Best results were obtained using Borax which imparted fire resistance.- Pulping of Anogeissus latifolia (Roxb.) Bedd.
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Indian Forester, Vol 100, No 5 (1974), Pagination: 351-356Abstract
Laboratory scale experiments on pulping of Anogeissus lotifolia by sulphate process are described. The wood had 18.5 per cent Pentosan content, 21.9 per cent lignin content and 74.0 per cent holocellulose. The average fibre length was 1.179 mm. and average fibre diameter was 0.0144 mm. At screened yield of 44 per cent, a breaking length of 7.34 km., burst factor of 42.1 and tear factor of 97.5 were obtained. The bleachability of the pulp was satisfactory and by applying 12 per cent total chiorine in CEHH sequence a brightness of 75 EEL having satisfactory strength properties of standard were obtained.- Chemical Pulps for Writing and Printing Papers from Cymbopogon winterianus Jowitt (Java Citronella Grass)
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Indian Forester, Vol 100, No 6 (1974), Pagination: 400-403Abstract
Laboratory experiments on the production of chemical pulps for writing and printing papers by soda process from unextracted and extracted Cymbopogon winterianus Jowitt, (Java citronella grass) are described. The average fibre length was 0.98 mm and the everage fibre diameter was 0.014 mm. Bleached pulps of good strength properties could be prepared from this raw material.- Pulping of Nepal Hardwoods
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Indian Forester, Vol 100, No 7 (1974), Pagination: 475-477Abstract
The paper contains the results of pulping of Western Nepal hardwooda, in a mixture containing 11 species by Sulphate process. The results are encouraging for making a feasibility report for a 100 tons to per day capacity paper mill in Nepal.- Note on Possibility of Use of Tea Stems in Paper Industry
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Indian Forester, Vol 100, No 9 (1974), Pagination: 564-565Abstract
no abstract- Soda Pulps from Nagaland Grasses for Writing and Printing Papers
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Indian Forester, Vol 100, No 10 (1974), Pagination: 627-631Abstract
Systematic investigations were carried out on laboratory scale on three Nagaland grasses, viz., thatch (Imperata cylindrica), khagra (Neyraudia reynaudiana) and bhutang (Saccharum procerum) for finding the suitability of soda pulps prepared from them for production of writing and printing papers. It was found that except for khagra top portion, all three grasses were suitable. When pilot plants trial were carried out to confirm the laboratory trials, it was found that bhutang top portions also not suitable.- Raw Materials for Paper
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Indian Forester, Vol 101, No 3 (1975), Pagination: 192-198Abstract
The article gives a brief description of paper making and the statistics of paper production. The essential factors to be considered for selecting a fibrous raw material for paper making are discussed. A detailed description follows of the following indigenous raw materials tested for paper making by the Forest Research Institute and being used at present by the Indian Paper Industry - Soft woods, Grasses, Bamboo, Straws, Bagasse and Hardwoods.- Pulping of Madhuca Longifolia (Koenig) Mac Bride Var. Latifolia (Roxb.) Chev
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Indian Forester, Vol 101, No 4 (1975), Pagination: 249-253Abstract
Laboratory experiments on the production of sulphate pulps from Madhuca longifolia var latifolia are described. The average fibre length of the pulp was 1.03 mm and average fibre diameter was 0.016 mm. The unbleached pulp yield was lower than obtained from other hardwoods in general. The strength properties of the standard sheets were satisfactory. The pulps were easy bleaching and the strength properties of bleached pulp sheets were satisfactory.- Sulphate Pulping of Giant Bamboo (Dendrocalamus Giganteus)
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Indian Forester, Vol 101, No 5 (1975), Pagination: 296-300Abstract
Bamboo is the main source of fibrous raw material for pulp and paper industry. Various species of bamboo are being used for this purpose. The main species used is Dendrocalamus strictus. The Forest Botanist, Forest Research Institute suggested that Dendrocalamus giganteus (I) which is the largest of bamboos should also be tested as this species of bamboo has not so far been used for the production of paper. The results of a comparative laboratory scale investigation or Dendrocalamus giganteus and D. strictus are recorded in this paper.- Pulping of Diospyros Melanoxylon
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Source
Indian Forester, Vol 101, No 7 (1975), Pagination: 407-412Abstract
Laboratory scale experiments on the production of sulphate pulps from Diospyros melanoxylon are described. The wood had 16.6 percent pentosan content, 21.1 percent ligain content and 79.03 percent holocellulose. The average fibre length was 1.14 mm and average fibre diameter was 0.0175 mm. Unbleached pulps in good yield and good strength properties could be prepared. The bleaching of pulp using CEHH sequence was, however, not satisfactory. Even by applying 13 percent total chlorine the bleached pulp had mottling effect.- Results of Laboratory Trials with Eucalyptus hybrid, Wood, Fresh and Afrer Storage for Newsprint
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