. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Canadian Forestrij Journal, September, 1917 1297 parts of sulphite pulp with suitable loading, sizing and coloring materials. Canadian production now totals about 2100 tons per day which is now over half the production of the United States. Only a small pro- portion is needed for Canadian news- papers so that about 89 per cent is available for export chiefly to the United States. Other products made by mixing groundwood and sulphite pulps are hanging paper (wall paper), the cheaper grades of wrapping paper and book paper,
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Canadian Forestrij Journal, September, 1917 1297 parts of sulphite pulp with suitable loading, sizing and coloring materials. Canadian production now totals about 2100 tons per day which is now over half the production of the United States. Only a small pro- portion is needed for Canadian news- papers so that about 89 per cent is available for export chiefly to the United States. Other products made by mixing groundwood and sulphite pulps are hanging paper (wall paper), the cheaper grades of wrapping paper and book paper, container board for paper boxes, liners for cars and boxes, paper for posters, etc. Hard Rubber Substitute Sulphite pulp in the unbleached or bleached state is used for making many papers of the higher grades in- cluding print paper, book and writing tissues and wax paper. Recent at- tention has been given to production of imitation parchment and grease- proof papers such as glassine. Sul- phite pulp is .well suited to the moulding of plastics such as. toys and novelties by incorporating binders. Vulcanized fibre or hard rubber sub- stitute is usually made by treating pulp with zinc chloride and mixing with red ferric oxide, with the addi- tion of glycerine if a phable product is desired. Some of the paper wheels and pulleys come under this head. A sample of surgical cotton substitute from Europe turned out to be an excellent product from bleached sul- phite pulp and it is reported that large quantities are being used by Germany during the present cotton shortage. Viscose is one of the artificial silk materials which can be readily made from wood pulp. Bleached sulphite pulp is first con- verted to alkali cellulose by treating with strong caustic soda and then to soluble cellulose zanthate by the addition of carbon disulphide. After pressing into threads through dies or moulding into heavier articles the material is readily converted back to stable cellulose in the form of art
Size: 2181px × 1145px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcanadianforestryassociation, bookcontributorrobartsun
