Method of dyeing naturally black fur skins

摘要

1,142,399. Dyeing naturally black fur skins. FRANKISCHE PELZINDUSTRIE MARKLE & CO. 9 Aug., 1967. No. 36510/67. Heading D1B. Naturally black fur skins, e.g. Persian lamb skins, are subjected to pretreatment with colloidal sulphur without prior bleaching and then subsequently surface dyed with vat dyestuff. Surface dyeing means that the dyestuff is contained only in the outermost part of the cortex.