FIELD: leather industry.
SUBSTANCE: method involves pickling leather depilated hide with sodium chloride and sulfuric acid, addition of chrome tanning agent to the same bath in its consumption 0.5-0.6% of depilated hide mass as measured for chrome oxide, and chrome-plating is carried out for 2-4 h. Aliphatic dialdehyde is added to same bath in the concentration 3-6% of depilated hide mass, and treatment is carried out for 2-3 h wherein glyoxal or glutaraldehyde is used as dialdehyde. Invention provides enhancing thermal stability and strength properties of leather and can be used in tanning leathers for different designation and assortment.
EFFECT: improved tanning method.
2 cl, 1 tbl, 9 ex
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