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Co-Authors
- A. K. Rai
- K. K. Sharma
- Rita Dhawan
- B. G. Karira
- K. S. Bhandari
- Anita Srivastava
- D. P. Bhatt
- Rajeev Kumar
- R. N. Madan
- S. N. Dhoundiyal
- Sushma Mahajan
- A. K. Raj
- S. P. Singh
- S. V. Singh
- J. D. Jain
- B. G. Kar
- P. P. Bhola
- G. M. Mathur
- Om Bahadur
- N. C. Kahera
- S. R. D. Guha
- Man Mohan Singh
- Krishan Kumar
- V. L. Moorthy
- D. K. Jain
- Krishna Kumar
- B. C. Mathur
- S. R.D. Guha
- Guha
- P. C. Pant
- R. C. Jain
- A. G. Jadhav
- Prem Nath
- J. B. Lad
- S. C. Desai
- J. P. Joshi
- G. C. Aggarwal
- R. Jesh Pant
- S. N. Dnoundiyal
- R. K. Gupta
- Rajesh Pant
- Rajesh S. P. Pant
- R. P. Goyal
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
Sharma, Y. K.
- High Density Short Rotation Poplars for Pulp and Paper Manufacture
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Indian Forester, Vol 117, No 3 (1991), Pagination: 213-224Abstract
Thee paper presents the results on high density plantation of poplars and their avaliability for pulp and paper manufacture as a short rotation crop. The reaults of the study at the age of two years indicated that total air, dried bole-biomass was higher (i.e. 24.4 t/ha) In case of Populus × euramericana '72/58' as compared to Populus deltoldes 'G-3' (17.5 t/ha). At the age ot three years, P. deltoldes 'G-3' had taken the lead and contributed the highest total bole air dried biomass i.e. 52.6 t/ha aa compared to 37.8 t/ha by P. × euramericana '72/58'. At the age of three years for both P. deltoldes '0-3' and P. × euramericana '72/58' the total air dried above ground biomass (bole end branches) was of the order of 55.5 and 45.5 t/ha, reapectlvely. The evaluation of pulping and papermaking qualities on pilot acale, using the woody material of P. × euramericana '72/58' Ind P. deltoldes '0-3' indlclted that a 50 : 50 mixture of 2 Ind 3 years ega wood with bark is suitable for producing wrapping paper from both the species. The laboratory experlments showed that the same mixture with bark is also suitable for producing writing and printing papers.
- Dissolving Grade Pulps from Tropical Pines
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Indian Forester, Vol 116, No 8 (1990), Pagination: 650-654Abstract
Results reported in this paper indicate that high alpha-cellulose pulps suitable for the manufacture of Filament Rayon and Tyrecord yarn can be produced from two species of tropica pines (P. pseudostrobus and P. greggi) by using acid -prehydrolyzed kraft process followed by multistage bleaching Dissolving-grade pulps were obtained in≈35-40% yield with ≈ 93--95% alpha cellulose and ≈86-88% Elrepho (I S.O.) brightness by using C/E/H/D or C/E/H/D/ E/D bleaching sequences.- Destructuring of Chips-a Concept of Optimum Utilization of Unpulpable Species
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Indian Forester, Vol 116, No 9 (1990), Pagination: 730-741Abstract
Pulping experiments on Eucalyptus tuelicornis and Xylia xylocarpa were undertaken in the present study, Laboratory experiments revealed that destructuring has definite advantages in pulping, Pulps of lower kappa number, coupled with higber pulp yield and lower rejects could be obtained at identical conditions or pulping However, these advantages are more significant in the calie of X. xylocarpa as compared to E. tereticornis. This could be due to higher specific gravity of X. xylocarpa Mixture of (1:1) of destructured chips of E. terelicornis and X. xylocarpa along with control were pulped at optimum conditions, derived from preliminary pulping expriments, (17% active alkali, 25% sulpbidity and about 1100 H. factor). It was observed that the mixture of destructured chips produced pulp having lower rejects, about 2% higher screened pulp yield and 5 points lower kappa number. However the physical strengtb properties of pulp from destructured and control chips were almost the same. A prototype laboratory machine was designed and fabricated for the destructuring of chips.- High Yield Pulps from Sesbania Species
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Indian Forester, Vol 115, No 11 (1989), Pagination: 816-821Abstract
Cold soda pulps were prepared from Sesbania aculeata and Sesbania aegyptiaca (with bark) under identical conditions. The chips Were soaked in a solution of caustic soda of different concentrations (11.25 gpl.-22.5 gpl.) for a period of 4 hours keeping the chips to liquor ratio 1 : 4. The softened chips were refined twice in Sprout Waldron refiner at about 10% consistency and keeping tbe clearance between plates 250 and 125 microns respectively. Temperature during refining was kept about 50°C. The pulps were screened on vibratory screen having 0.25 mm slots. The unbleached yield of screened pulps was determined in the range of 70.62-78.9% in case of Sesbania aculea, a and 70.50-76.29% in case of Sesbania aegypliaca. The pulps were beaten in lampen mill varying the beating time, to obtain different freeness. The pulps were classified. using Bauer Mc.-Nett classifier. The fines passing tbrougb 200 mesb wne 15.01-31.63% and 14.41-34.8% in Sesbania aculeala and Sesbania argyptiaca respectively. This is comparable with the hardwood chemi-mechanical pulps. Tbe opacity and brightness of unbleached pulps were 96.9% and 54.5% in case of S. aculeata and 97.1% and 565% in case of Sesbania aegyptiaca respectively. The cold soda pulps obtained from the above two species, can be admixed with long fibre chemical pulps to produce newsprint. The pulps are also suitable when admixed long fibre pulp for the production of several industrial papers.- Assessment of Tropical Pines for Pulping and Paper Making Characteristics
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Indian Forester, Vol 113, No 2 (1987), Pagination: 127-139Abstract
Pinus greggii, P. psudostrobus, P. montezume,& P. taeddi of young age (8-10 years) were pulped using 14%, 16% &18% active alkali, 25% sulphidity at about 1906 H factor to assess pulping and papermaking characterstics. It was observed that kraft pulps of these tropical pine species do not have any appreciable difference in physical strength properties of handsheets. All the pulps produced were in the range of burst index, 4.35 ± 0.75; tensile index, 61.65 ± 9.65; tear index. 7.89 ± 0.74 at freeness 300 ml CSF. Total pulp yield and kappa number decreased with the increase in active alkali charge, as expected Comparatively lower tear index in all the cases could be attributed to the young age of the wood samples, used. However, at burst index 3.0 and tensile index 40.0, the tear index was found to be above 10.0. Slight dlfference in physical strength properties at different chemical charge within the species and among the species was observed. It was observed that their was no appreciable improvement in physical strength properties of unbleached pulps on increasing the alkali charge (at least over 16% alkali charge at freeness 300 ml CSF), except decrease in kappa number, under the conditions studied. Therefore, it could be concluded that for unbleached grade pulps, 16% active alkali would be suitable. However, 18% active Alkali would be more suitable to produce easy bleachable pulps of lower kappa number (⋍ 35). Proximate chemical analysis and fibre dimension analysis have been carried out and recorded in the paper. These have also been correlated with the pulping and papermaking characteristics of individual sample. A comprehensive review on the work done by various workers at this institute on the pulping and papermaklng characteristics of some of the indigenous and exotic pine species have also been included in the paper for comparison.- Note on Pilot Plant Trials on Pulp and Paper Making Characteristics of Pinus greggii and Pinus pseudostrobus
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Indian Forester, Vol 113, No 7 (1987), Pagination: 479-483Abstract
Samples from young (10-12 years old) Pinus greggii and Pinus pseudostrobus were pulped with 18% active alkali, 25% sulphidity at 1905 H factor in an indirectly heated forced circulation type vertical stationary digester in pilot plant. There was no appreciable difference in screened pulp yield (43.0 ± 1%) and kappa number (38.6 ± 2.0) of unbleached pulps in the two species studied. Unbleached and bleached pulps from both the species were evaluated for their physical strength properties at laboratory scale and MG kraft paper was made at pilot plant. Laboratory evaluation and pilot plant trial revealed that pulps from P. greggii possess better bonding properties than P. pseudostrobus at comparable tearing strength.- Thermo-mechanical Pulps from Tropical Pines
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Indian Forester, Vol 112, No 2 (1986), Pagination: 163-168Abstract
Pinus greggil, Pinus pseudostrobus, Pinus montezumae and Pinus taeda chips were pulped by thermo-mechancial pulping process to produce pulps suitable for newsprint production. In all the cases the chips were subjected to about 125°C temparature for a period of 3 minutes and refined. In first stage refining a plate clearance of 3.0 mm was kept and refining was done at 17 ± 2% consistency. The pulps were refined in second stage at a plate clearance of 0.15 mm to obtain a freeness of 250 ± 20 ml C.S.F. All the four species of tropical pines produced pulps having satisfactory strength properties. The standard hand sheet properties. In all the cases were almost similar (tear index 2.27 ± 0.2, tensile index 8.5 ± 1.3, opacity 99 ± 0.5 and brightness of unbleached pulps 35.5 ± 1.6% I.S.0.). The results indicated that pulps, in ultra high yield could be prepared, suitable for newsprint production from these tropical pines. The unbleached pulp brightness was, however, lower which could be increased by employing a lignin preserving bleaching method.- Boswellia serrata Resin Gum a Potential Internal Sizing Agent for Paper
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Indian Forester, Vol 111, No 3 (1985), Pagination: 149-157Abstract
Crude, ethanol extracted and acid hydrolysed Boswellia serrata resin gums were tested for their internal sizing capability and compared with the conventional internal sizing agent, pine rosin. It was observed that crude resin gum has poorest sizing capability, Ethanol extracted resin gum and acid hydrolysed resin gum are best among these. From series of Laboratory and pilot plant experiments, it was concluded that 1.50% of acid hydrolysed B. serrata resin gum gives equally sized paper as 100% of pine rosin(Cobb 60, 24.0±1.2).- Evaluation of Hardwoods of Andaman and Nicobar Islands for Kraft Pulps for Wrapping, Writing and Printing Papers
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Indian Forester, Vol 111, No 6 (1985), Pagination: 453-466Abstract
The present paper gives a comparative account of basic density and kraft pulping characteristics of fourteen species of Barataung area and eighteen species of Middle Andman area of Andaman&Nicobar Islands. The properties of kraft pulps of individual species have also been evaluated. It has been found that the basic density varied widely with species in both areas. In Barstaung area the variation was from 0.302 to 0.847 g/cm2, whereas for Middle Andaman gives area it was in between 0.261 to 0.728 g/cm2. Laboratory experiments on kraft pulping of individual species have shown that most of them gave screened pulp in the range of 40-45% yield, the only exception being Mitraeyna retundifolia of Barataung area and Knema sp of Middle Andaman area which gave pulp yield below 40%. The physical strength properties of unbleached kraft pulps of all the species were found to be adequate for wrapping grade paper. Pilot plant trials have shown that the mixed species of both areas could be pulped wlth 18% active alkali (as Na2O) to produce unbleached kraft pulps of about 45% of yield. The paper made from these unbleached kraft pulps on pilot paper machine was of satisfactory strength for use as wrapping paper. It was further established that these pulps could be bleached to 75 brightness by conventional C/E/H/H/ sequence to produce writing and printing paper.- Newsprint grade Refiner Mechanical Pulps from Kenaf Sticks
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Indian Forester, Vol 111, No 9 (1985), Pagination: 720-724Abstract
Laboratory experiments were carried out on the production of refiner mechanical pulps from kenaf sticks and chemical (Soda) pulp from kenaf base fibre. The blending of the pulps indicates that newsprint grade pulps could be produced from a furnish containing 80 per cent refiner mechanical pulps of kenaf sticks and 40 per cant chemical (Soda) pulp of kenaf best fibre. Our earier studies have indicatad that kenaf best fibre shows Poof bleaching response. Hence, in the experiments only unbleached pulp was used.- Pulping of Kenaf Bark - Soda Vs.sulphate
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Indian Forester, Vol 111, No 10 (1985), Pagination: 832-836Abstract
Contrary to the long recognized superiority of wood sulphate pulps over wood soda pulps, it was observed that the yield and strength properties of soda and sulphate pulps from kenaf bark were approximately equivalent under identical cooking conditions. However,the two types of pulps differed in their response to bleaching. Soda pulp consumed higher bleaching chemical, but, showed lesser degradation than sulphate pulp, which is contrast consumed lesser bleaching chemical, but, showed considerable degradation under identical bleaching conditions.- A Note on Insulation-boards from Jute Sticks
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Indian Forester, Vol 111, No 4 (1985), Pagination: 219-224Abstract
Investigations have been carried out on insulation boards with a view to evaluate suitability of jute sticks for fibre boards. Comparing the results of jute sticks fibre board with the rice straw board' it is observed that jute sticks fibre are stronger' stiffer and dimensionally stable than rice straw boards. As the results on these studies are quite encouraging' the jute sticks can be used as raw material' for making insulation fibre boards.- Production of Rayon Grade Pulp from Moringa oleifera
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Indian Forester, Vol 110, No 3 (1984), Pagination: 303-306Abstract
Present study for the production of rayon grade pulp from Moringa oleifera (M. oleifera) by probydrolysed sulphate process shows that M. oleifera is a suitable raw material for the production of high alpba cellulose pulps for use in cellopbane and textile.- High Yield Pulps from Kenaf
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Indian Forester, Vol 110, No 4 (1984), Pagination: 401-406Abstract
Laboratory scale experiments were carried out on the production or newsprint grade pulps from kenaf by chemi-mechanical pulping processes. Cold-soda, and alkaline sulphite processes were adopted. which could give pulps in high yield (≈7l-88%) having satisfactory strength properties, brightness and opacity. Blending of these pulps with a commercial bleached bamboo pulp further improved the strength properties and brightness.- A Note on Production of High Alpha Cellulose Pulp from Leucaena leucocephala
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Indian Forester, Vol 110, No 6 (1984), Pagination: 582-585Abstract
The present investigation reveals that the Su-babul can be utilised for the production of alpha-cellulose. The chemical purity shows that the raw material is suitable for preparing cellophane and textile in high yield (39.8%).- Newsprint Grade Pulps from Pinus patula
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Indian Forester, Vol 110, No 7 (1984), Pagination: 673-681Abstract
Plantations of different species of tropical pines have raised all over the country. Tropical pines can be a good raw material resource for the much wanted newsprint grade printing paper. In this paper, results on pulping of Pinus patula grown in Uttar Pradesh, by sulphate, chemi-mechanical and refiner mechanical processes have been recorded. Results show that suitable pulps in good yield can be produced by these processes. Blending studies of these three type of pulps further revealed that newsprint grade paper can be produced from Pinus potula.- A Note on High Yield Pulping of Wheat Straw
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Indian Forester, Vol 110, No 11 (1984), Pagination: 1109-1116Abstract
High yield pulping of wheat straw was carried out using sodium hydroxide and a mixture of sodium hydroxide + Sodium carbonate as pulping chemicals. Anthraquinone was used as a pulping additive. On the basis of series of experiments, it was observed that pulps with almost similar pbysical strength properties could be obtained by using 2% NaOH + 6% Na2CO2, 4% NaOH + 2% Na2CO3 and 6% NaOH. However, pulp yield was slightly higher in case of 2% NaOH + 6% Na2CO3. From the present study it was concluded that sodium hydroxide could be replaced partially by sodium carbonate without adversely affecting the quality and quantity of pulp produced.- Pulping and Pulp Blending Studies of Gunny Bags, Bagasse and Sesbania aegyptiaca for Writing and Printing Paper
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Indian Forester, Vol 110, No 12 (1984), Pagination: 1192-1200Abstract
Soda pulping of gunny bags, bagasse and Sesbania aegyptlaca were carried out using 8%, 10% and 16% alkali respectively. Each pulp was bleached using two stage calcium hypochlorite with fresh water wash in between two stages. Pulp evaluation of indivIdual pulp and pulp blended in dlfferent ratio were carried out. It was observed that Sesbania aegyptiaca produces superior pulp than the bagasse at almost same bleached pulp yield with higher pluplng chemical. From the blending studies it was concluded that 20 : 60 : 20 or 20 : 40 : 40 blending ratio for gunny bags: bagasse: Sesbania aegyptiaca; 20 : 80 blending ratio for gunny bags: bagasse and gunny bags: Sesbania aegyptiaca yielded better properties.- Use of Kenaf and Roselle as Papermaking Fibres
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Indian Forester, Vol 109, No 6 (1983), Pagination: 401-406Abstract
no abstract- A Note on Blending of Pulps from Eucalptus hybrid and Saw-mill Waste of Conifers
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Indian Forester, Vol 109, No 8 (1983), Pagination: 569-577Abstract
Airy Shaw while describing Gentianella glanduligera in 1943 stated that it was unknown in wild state. Recently, however, it has been collected in wild state in India and is being reduced to a varietal rank under Gentianella maddenii (Clarke) Airy Shaw. T. A. Rao collected a specimen in 1957 from Kumaun Hills and identified it as Gentiana recurvata Clarke; it was recorded by him as new for the North-West Himalaya. A critical study of this specimen revealed that it actually belonged to Gentianella glanduligera Airy Shaw having smaller stems and flowers than the Gentianella maddenii (Clarke) Airy Shaw; protologue and icon of the species confirmed the identity.- Poplars for Paper Making
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Indian Forester, Vol 109, No 9 (1983), Pagination: 655-660Abstract
Bamboo the main basic domestic raw material used in pulp and paper industry are fast becoming in shorl supply. The industry should increasingly use the alternative raw materials. This article deals with the Work done on suitabilily of poplar for pulp and paper and suggest the future line of work to be carried out for more rational use of poplars in pulp and paper industry of the country.- Eucalyptus for Pulp and Paper Making
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Indian Forester, Vol 109, No 12 (1983), Pagination: 944-968Abstract
A historical background of pulping of Ecalyptus is reported. Work done in Cellulose and Paper Branch, Forest Research Institute on various species of Eucalyptus by various pulping processes is discussed and results are recorded in the paper.- Alkaline- Anthraquinone Pulpling of Wheat Straw
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Indian Forester, Vol 109, No 7 (1983), Pagination: 482-494Abstract
Soda and Soda-Anthrequinone (AQ) pulping of wheat straw were carried out with an aim ie produce pulps for writing and printing papers with fairly good brightness. 11.75,%. active alkali (without AQ) and 10% active alkali (with AQ) produced a pulp of Kappa number 25 ± 1 at 1665 'H' factor with almost identical physico-chemical properties. A gain of 1.8% pulp yield was also observed in latter case. Pulps thus obtained (with and without AQ) have shown almost similar bleaching response. When bleached by C/E/H (5% available chlorine, 2% NaOH extraction/2.5% available chlorine) upto brightness of elrepho 72.9% ± 0.5. Kraft-AQ pulping (8% active alkali, 8.5% sulphidity) has also been carried out. Under the experimental conditions it was obseryed that the presence of hydrosulphide ion (sulphidity 8.5%) in cooking liquor have shown only slight advantage over soda pulps at same level of active alkali.- A Preliminary Note on Alkaline - Anthraquinone Pulping of Eucalyptus grandis
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Indian Forester, Vol 108, No 6 (1982), Pagination: 455-459Abstract
Soda, Soda-anthraquinone (AQ) (both at 16% active alkali, approx. 1115, H factor) and Kraft (l4% active alkali, approx. 810, H factor, 25% sulphidity) pulpings were carried out to compare the yield, degree of delignification and physical strength properties of unbleached pulps, It was observed that soda. AQ pulp was slightly better than the controlled soda pulp but was inferior to the kraft pulp in respect to its quality and yield.- Kraft Pulping of Leucaena leucocephala
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Indian Forester, Vol 108, No 3 (1982), Pagination: 202-211Abstract
Laboratory Investigation reveals the potentiality of Leucaena leucocephala, a fast growing species commonly cultivated to have diverse uses such as, firwood, timber, nutritious forage, dye, gum and rich organic fertilizer, for pulp and paper making to supplement the existing raw material resource. Leucaena wood has bigh holocellulose, low ash and solubilities. Unbleacbed kraft pulp. With about 48-56% yield can be produced with low active alkali (12-16% at 170°C for 150-240 minutes. The pulp with 14% active alkali and 2430 H -factor can be bleached to 70% ISO brightness with 10% chlorine by C/E/H sequence and Is suitable for writing and printing papers. The black liquor has good colloidal stablity during evaporation and burning properties.- 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.- 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.- 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.- 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.- 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- 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 Papers from Lantana camara
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Indian Forester, Vol 92, No 2 (1966), Pagination: 122-126Abstract
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.- 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 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- 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.- 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.- 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.- Pilot Plant Production of Medium Filter for Seed Testing
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Indian Forester, Vol 96, No 8 (1970), Pagination: 609-611Abstract
Pilot plant scale trials on production of medium filter for seed testing are described. This variety of speciality paper is at present being imported. The important characteristics of this paper are an open, porous formation; freedom from fungi or bacteria that might interfere with the growth of germinating seedlings; freedom from toxic substances; and satisfactory strength properties especially wet strength.- 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.- 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.- Pulp and Paper Industry in Australia
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Indian Forester, Vol 97, No 12 (1971), Pagination: 691-698Abstract
no abstract- 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.- 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.- 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.- 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.- Pulping of Diospyros Melanoxylon
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