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- Nirankari Devi
- P. P. Bhola
- S. R. D. Guha
- R. N. Madan
- Rita Dhawan
- K. K. Karira
- B. G. Karira
- G. M. Mathur
- K. K. Kalra
- V. K. S. Karima
- Y. K. Sharma
- Krishan Kumar
- S. P. Singh
- S. K. Purkayastha
- A. K. Gupta
- Krishna Lal
- Swarna Singh
- R. V. Bhat
- R. V. Brat
- V. B. Saxena
- B. C. Mathur
- V. N. Mukherjea
- S. N. Dhoundiyal
- H. S. Sabharwal
- G. C. Aggarwal
- Boon Sueb Chittivanich
- Lee Seng Gay
- Laxmi Sharma
- S. V. Singh
- Anil Kumar
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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
Singh, Man Mohan
- 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.
- Investigations on Andaman and Nicobar Islands Woods for Different Grades of Paper
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Indian Forester, Vol 107, No 6 (1981), Pagination: 377-383Abstract
Laboratory scale experiments were carried out on the production of wrapping, writing, printing and newsprint grade pulps from seven species by different pulping processes like sulphate, neutral sulphite, semi-chemical (N.S.S.C) and cold soda Unbleached pulps suitable for wrapping papers were obtained in satisfactory yield, and having satisfactory strength properties by using sulphate and (N.S.S.C.) process. For writing printing,paper the pulps were bleached by CEH sequence. Bleached pulps in satisfactory yield and good strength properties were obtained. Pulps in high yield could be obtained by cold soda process. Which when admixed with 28 bamboo sulphate pulp were considered to be suitable for newprint. Comparative suitability indice of wood, for wrapping and writing printing papers were calculated. From the results it Can be conciuded that all the seven species are suitable for wrapping, writing, printing and newsprint grade pulps.- Production of Chemical, Mechanical and Semi-chemical Pulps from Clones of Populus deltoides
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Indian Forester, Vol 107, No 11 (1981), Pagination: 725-733Abstract
Poplar clones of Populus deltoides namely G3, 72/58, 61/183 grown in Lal Kuan (Haldwani Division) and IC, 69/55 and 65/27 grown in both Clutterbuckganj (Barel illy) and Lal KUan (Haldwani) have been evaluated as pulp making raW materials for chemical, mechanical and semi-chemical pulping. It is observed that locality effects the yield as well as properties. Different clones have different suitability indices as compared to IC grown in Lal Kuan (Haldwani), when chemical pulps were prepared from different Samples. Pilot plant trials show that pulps from P. deltoides is suitable production of wrapping paper.- 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- 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.- 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.Full Text
- Chemical Nature of Soda Lignins and Pulp Sheet Properties of Indian Bamboos
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Indian Forester, Vol 104, No 6 (1978), Pagination: 438-449Abstract
The lignin content of different species of bamboo of Indian origin varies within narrow limits of 24±3%. The carbon and hydrogen content of these lignins are 59.7±3% and 6.3±0.5% respectively. The number of C9 units varies from 12 to 21 with an average of 14 indicating that the structure of bamboo lignin skeleton is more akin to hardwoods than conifers. The I.R. Spectra of all these is similar and show that bamoo lignin is composed of polymer of mainly propyl guaiacyl, propyl syringyl, as well as p-hydroxy benzal. There is a correlation between the number of C9 units of different bamboos and breaking length of the beaten pulps.- 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.- A Reappraisal of the Suitability of Mella azedarach as a Paper Making Raw Material
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Indian Forester, Vol 103, No 9 (1977), Pagination: 641-650Abstract
A fresh study of the suitablity of Melia azedarach for pulp and paper has shown that it is a very promising raw material for wrapping, writing aDd printing paper provided the trees are grown not too fast. Very fast grown material is characterised by very low specific gravity and wide fibres with large lumen. These fibres collapse due to their thin walls during the course of sheet formation resulting in poor strength properties. The earlier reports on its unsuitability were apparently based on tests carried out on very fast grown material.- 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.- Fibre Morphology and Pulp Sheet Properties of Indian Bamboos
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Indian Forester, Vol 102, No 9 (1976), Pagination: 579-595Abstract
Fibre morphology and pulp strength of twelve species of bamboos grown in the arboratum of the Forest Research Institute, Dehra Dun were studied in two sets of pulps. In all the species fibre dimensions and particularly lumen width were found to vary widely indicating highly heterogenous nature of the pulp. The fibre dimensions were also significantly different in the two sets. Parenchyma proportions were also found to be different in the two sets. No marked differences were found in the various species as regards chemical composition of either chips or pulps, as well as alkali consumed during pulping. But, wide differences were found in strength properties, in unbeaten and beaten pulps of the 12 species of bamboos studied. However, these differences were considerably reduced on beating. As the ranking of tbe species on the basis of strength in unbeaten and beaten conditions is different strength of beaten pulp cannot be predicted from the unbeaten one. Further, significant differences were observed between the two sets of pulps in both unbeaten and beaten hand sheets. No relationships could be found between the fibre characteristics and the pulp strength properties, It appears from this study that because of wide variations within a species, fibre characteristics cannot be used as a criterion for classifying the bamboos for paper and pulp production. On the basis of pulp yield, alka1i consumption and sheet properties of the 12 species, they have been graded and Dendrocalamus hamiltonii has been found to be the best.- 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 Iv.-writing and Printing Papers from Helioteres isora, Linn. (Maror phal)
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Indian Forester, Vol 77, No 11 (1951), Pagination: 664-675Abstract
Laboratory experiments on the production of chemical pulps from Helicteres isora, Linn. (marar phal) are described. Results of pilot plant experiments on the production of chemical pulps and writing and printing papers are included. Admixture of chemical pulps from marar phal with long-fibred chemical pulps such as sabai grass pulp gave writng paper with higher strength properties. It has recently been reported that the bark of Helicteres isora has been found suitable as a substitute for jute in the preparation of gunny bags. The wood of this species should, therefore, be available at a cheap price. Besides, there is no other use for this wood.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board Part V.-Pulps for Strawboards From Ulla Grass (Themeda arundinacea) and Panni Grass (Vetiveria zizanioides)
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Indian Forester, Vol 78, No 1 (1952), Pagination: 2-8Abstract
There is a great disparity between the rated capacity and the production of strawboard mills in India due to the shortage of fibrous raw materials. Wheat and rice straws used for the production of these boards are not available to these mills in sufficient quantities as these are required for cattle fodder. Laboratory experiments carried out in this Branch have shown that pulps suitable for strawboards can be prepared from ulla grass ( Themeda arundinacea, Ridley, Syn. Anthistiria gigantia, Cav. ) and panni grass ( Vetiveria zizanioides, Stapf., Syn. Andropogon squarrosus, Hook. ) by digestion with lime. Since these grasses have no special use and are burnt down every year to prevent fires in forests, these should be available at cheap rates.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board - Part X. - Writing and Printing Papers from Panni Grass (Vetiveria zizanioides)
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Indian Forester, Vol 78, No 6 (1952), Pagination: 292-298Abstract
Laboratory experiments on the chemical pulping of panni grass (Vetiveria zizanioides) by the soda process are described. Pilot plant experiments on the production of chemical pulps and writing and printing papers are also included. A sample of writing paper made from a mixture of 60% of panni grass pulp and 40% sabai grass pulp is appended. These experiments have shown that panni grass can be used for making chemical pulp and that writing and printing papers can be made from a furnish containing a mixture of panni grass pulp and a long-fibred pulp such as sabai grass pUlp.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board. Part XXII - Wrapping Papers from Trema orientalis Blume
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Indian Forester, Vol 80, No 8 (1954), Pagination: 453-465Abstract
Laboratory experiments on the production of sulphate and soda pulps for wrapping papers from Trema orientalis Blume (kargol) are described. Results of pilot plant experiments are also included. These experiments have shown that Trema orientalis is a promising raw material for the production. Of wrapping papers in high yields and of satisfactory strength properties. Since this wood is short-fibred, it will be necessary to mix a suitable quantity of bamboo Sulphate pulp with kargol pulp for manufacturing wrapping papers on commercial paper machines. Six samples of wrapping papers from Trema orientalis are appended in this bulletin together with two samples of wrapping papers from bamboo.- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board
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Indian Forester, Vol 81, No 12 (1955), Pagination: 765-773Abstract
Laboratory experiments on the production of pulps from twisted chir (Pinus longifolia Roxb.) by the sulphate process for wrapping papers are described. Results of pilot plant experiments are also included. Wrapping papers were prepared on the pilot plant from 1OO% twisted chir sulphate pulp, a mixture of 70% chir sulphate pulp and 30% chir mechanical pulp, a mixture of 69% chir sulphate pulp and 31% bagasse soda pulp, and 100% bagasse soda pulp. A sample each of the wrapping papers from these four furnishes are appended to this bulletin. The average fibre length of the twisted chir was 4.79mm. This investigation has shown that twisted chir is a useful fibrous raw material for the manufacture of wrapping papers.- Viscose Rayon Pulp from Blue Gum (Eucalyptus globulus Labill.) by Water-prehydrolysis Sulphate Process
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Indian Forester, Vol 83, No 6 (1957), Pagination: 379-383Abstract
A method for the preparation of viscose rayon grade pulp from blue gum wood has been worked out. Water-prehydrolysis sulphate process followed by muUltistage bleaching and refining has been used. The pulp was tested in Germany by a well-known viscose rayon pulp manufacturing firm and found to fulfil the conditions required for viscose rayon pulp.- Pulps for Strawboards from Andropogon Contortus Linn (Kusal Grass)
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Indian Forester, Vol 86, No 1 (1960), Pagination: 28-32Abstract
Laboratory experiments carried out on the production of strawboards from Andropogon contortus Linn (kusal grass) by the lime process are described. Suitability of tea waste and ischolar_mains of panni grass (Vetiveria zizanioides) for the production of strawboards was also investigated. Strength properties of commercial strawboards were determined for getting data for such boards.- 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.- 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 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 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.- 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- 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.- Fibrous Raw Material for the Indian Pulp, Paper and Board Industry
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Indian Forester, Vol 91, No 7 (1965), Pagination: 505-529Abstract
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.- High Alpha-pulp from Wattle (Acacia mollissima Willd.) by Water Pre Hydrolysis Sulphate Process
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Indian Forester, Vol 93, No 7 (1967), Pagination: 486-488Abstract
High alpha cellulose pulps have been prepared from Acacia mollissimaWilld by waterperhydrolysis sulphate process followed by multl-stage bleaching process.The pulps could be considered for preparing various cellulose derivatives like viscose rayon, nitro cellulose, cel1ulose acetate, etc., provided these pulps pass further tests required.- 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.- 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.- 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.- 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.- Influence of Variation in Fibre Dimensions and Parenchyma Proportion on Sheet Properties in Bamboo
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Indian Forester, Vol 97, No 7 (1971), Pagination: 412-421Abstract
By testing hand sheets made from 32 mixtures of different fractions of a pulp of Dendrocalamus striclus, beaten to 250 ml. (C.S.F.), the effect of variations in fibre dimensions on strength properties have been investigated. Fibre length, determined from unbeaten pulp, accounts for 77 to 90 per cent of the variation in strength properties viz. breaking length, burst factor and tear factor. Other fibre characteristics viz. ratio of lumen width to fibre diameter and percentage of fibres with obliterated lumen, which also exhibit similar relationship with the strength properties, are highly correlated with fibre length. Parenchyma proportion shows a high negative correlation with the sheet properties. Fibre length and parenchyma proportion together account for 94 per cent of the variation in strength properties.- 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.- 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.- 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.- Results of Laboratory Trials with Eucalyptus hybrid, Wood, Fresh and Afrer Storage for Newsprint
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