Studies on Chir pine (Pinus roxburghii) bark tannins and their leathring qualities
Studies on Chir pine (Pinus roxburghii) bark tannins and their leathring qualities
Abdul Aziz Khan and M. Jamil Khan
ABSTRACT
Studies have been undertaken to investigate the suitability of chir pine (Pinus roxburghii) bark tannins as and indigenous material for commercial production of vegetable tanned light and heavy-leather. Solids were prepared by extracting chir pine bark without any
treatment as well as with 0.5%, 1.0%, and 2.0% sulphitation and thin drying the extract under reduced pressure. Pickled and deli med identical pieces of sheep and goat skins were tanned with pine and imported mimosa solids for comparative studies of light leather
producing qualities under similar tanning conditions. For production of heavy leather, depickled buffalo hide pieces were tanned. Comparative studies of shrinkage temperature, tensile strength and elongation of resultant leather indicate that chir pine solids produce
somewhat better leather as compared to that obtained by tanning with mimosa solids. It is concluded that chir pine bark solids can be successfully utilized for commercial production of light as well as heavy leather of desired qualities.
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March 1979
Vol. 29, Iss. 1
