METHOD FOR MAKING LEATHER Russian patent published in 1994 - IPC

Abstract RU 2016906 C1

FIELD: leather manufacturing. SUBSTANCE: leather is tanned in one bath. After additional tanning with chromium containing tanning agent, the semi-product is subjected to the first-stage dyeing with acid dyes at 20-30 C, followed by tanning with synthetic dyes in which are introduced alums in the amount of 0.05-0.12% (by aluminum oxide) and formate-and-alcohol plasticizer in the amount of 0.15-0.35%. Then follow neutralization, second-stage dyeing with direct dyes at 55-60 C, and fat-liquoring. EFFECT: increased efficiency of the process. 2 tbl

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RU 2 016 906 C1

Authors

Danilkovich A.G.

Kas'Jan Eh.E.

Lishchuk V.I.

Koval'Kov V.A.

Denisenko N.I.

Dates

1994-07-30—Published

1991-08-23—Filed