Excerpt from Leather Investigations: The Composition of Some Sole Leathers Leather is not a definite compound and is therefore impossible to produce. Of an exact composition. The ratio of combined tannins to hide substances approximates 7 to 10 (see last column of table on pp. 16 to while the percentages of water - soluble constituents, min eral matter, fat, and moisture may vary considerably. Careful study of the analyses of well-tanned, scoured leathers of various tannages, both American and foreign, warrants the ...
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Excerpt from Leather Investigations: The Composition of Some Sole Leathers Leather is not a definite compound and is therefore impossible to produce. Of an exact composition. The ratio of combined tannins to hide substances approximates 7 to 10 (see last column of table on pp. 16 to while the percentages of water - soluble constituents, min eral matter, fat, and moisture may vary considerably. Careful study of the analyses of well-tanned, scoured leathers of various tannages, both American and foreign, warrants the conclusion that well-tanned, merchantable, scoured sole leather of-all tannages on analysis should give results on a moisture-free basis which fall between the following limits: Leather substance from 75 to 93 per cent, hide substance from 43 to 57 per cent, combined tannins from 31 to 42 per cent, water soluble materials from 5 to 15 percent, oils and fats from 1 to 6 per cent, ash from to 1 per cent.'8 'leather investigations: sole leathers. Well-tanned, honestly-made leather Should approach the upper rather than the lower limits for leather substance and oils and fats. The water-soluble constituents should consist only of the materials contained in the adhering tanning solution which have not been removed in scouring. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Add this copy of Leather Investigations the Composition of Some Sole to cart. $21.34, new condition, Sold by Paperbackshop rated 4.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2019 by Forgotten Books.
