R. V. Bhat , Narendra S. Jaspal

Abstract

Laboratory experiments on the production of chemical pulps by the sulphate process from the wood of Trema orientalis are described. 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 and these pulps can be utilized in admixture with about 25-40% of a long-fibred pulp such as bamboo pulp for the production of writing and printing papers. Two samples of paper are appended in this bulletin. One of them is a writing paper made from a stock containing 75% of T. orientalis pulp and 25% of bamboo bleached pulp and the other is a printing paper made from a stock consisting of 60% T. orientalis pulp and 40% of bamboo pulp.

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R. V. Bhat , Narendra S. Jaspal

Abstract

Pilot plant experiments on the production of writing and printing papers from castor stems are described. The pulps were prepared by the sulphate process. Since castor stems are short-fibred, 30% bamboo pulp was blended with their pulp in the manufacture of papers. The papers were characterized by good formation and satisfactory strength properties. Two samples of papers are appended in this bulletin. One is a writing paper and the other is a printing paper.

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R. V. Bhat , Narendra S. Jaspal

Abstract

Laboratory experiments on the production of wrapping papers from castor stem (Ricinus communis Linn.) of the annual variety are described. Wrapping papers Were made on the pilot plant of the Forest Research Institute from 100% castor stem pulp and also from a mixture of 70% of this pulp and 30% bamboo kraft pulp. These papers were characterised by good formation and satisfactory strength properties. A sample of wrapping paper made on the pilot plant is included in this publication. The utilization of castor stalk for the manufacture of wrapping papers will depend upon the price at which it can be made available at the mill site.

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R. V. Bhat , Narendra S. Jaspal

Abstract

Pilot plant scale experiments on the production of writing and printing papers from elephant grass are described. Pulps were prepared by soda and sulphate processes. Writing and printing papers were made from IOO per cent elephant grass pulp. Four specimens of papers are appended here.

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