Leather treatment and agent
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United States of America Patent
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Jan 22, 2013
Grant Date -
Oct 8, 2009
app pub date -
Nov 27, 2006
filing date -
Nov 29, 2005
priority date (Note) -
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Abstract
D-Isoascorbic acid or one of its salts, as such or as a constituent of a liquid or solid formulation, is an effective agent for reducing the amount of Cr(VI) compounds in leathers tanned with Cr(III) salts by treatment of the leather in an aqueous liquor after tanning or finishing or of a commodity article with an aqueous solution.
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