FUR SKIN PROCESSING Russian patent published in 2002 - IPC

FIELD: fur-making. SUBSTANCE: processing involves tannage with aqueous composition containing 40% formalin, sodium chloride, and sodium carbonate. Tannage is conducted in presence of (i) special preparation "Gamma 3" composed of nonionic surfactant, organic solvent, and additives based on cyclic terpenes and (ii) tanner based on polyacetals of low-molecular alcohols with additives. Gamma 3 is added in the beginning of processing and tanner is added by two parts: first 1.0-1.5 h after the beginning of processing and then 1.0-1.5 h later simultaneously with 40% formalin. Tannage is followed by salting with greasing. EFFECT: reduced processing duration and improved environmental quality of fur semifinished product. 3 cl, 2 tbl