METHOD FOR DYEING ANIMAL PROTEIN FIBER OR FIBER PRODUCT INTO DARK COLOR

摘要

PURPOSE:To dye an animal protein fiber or a fiber product into dark color using various dyes such as synthetic dyes and natural dyes by carrying out simple pretreatment without using specific dyeing processing facility and a processing machine. CONSTITUTION:An animal protein fiber or a fiber product is subjected to pre- treatment with an alkali water solution having such low alkali concentration as not to substantially damage the fiber or the fiber product, and then, the fiber or the fiber product is subjected to dyeing treatment.