Economy chrome tanning
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United States of America Patent
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Dec 18, 1990
Grant Date -
N/A
app pub date -
Apr 25, 1989
filing date -
Apr 27, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for economy chrome tanning, which comprises pretreating the pelt prior to tanning with 0.5 to 2% by weight, preferably 0.7 to 1,2% by weight, of an aldehyde- or keto-carboxylic acid, tanning in a conventional manner and then finish-tanning with 2 to 4.5% by weight of a mixture of a chromium(III) salt, an acid-binding agent and an aromatic di- or tricarboxylic acid or a salt thereof.
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