FIELD: dyeing and decorating industry. SUBSTANCE: wool is impregnated by water-alkali solution of an azo constituent, which is water-alkali extract of buckwheat with liquor ratio 1:50 for 12-24 h at 20 C and for 20-30 min at 70-80 C. Then, wool is treated by diazonium salt taken in amount 1-2% of wool weight at 10-15 C for 10-15 min. EFFECT: optimized process parameters. 1 tbl
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