FIELD: textile industry. SUBSTANCE: invention relates to chemical technology of whitening textile material of wool and real silk fibers. Material is impregnated at pH 2- 3 and 45-50 C with aqueous solution of bleaching composition containing hydrogen peroxide, hydroxyethylidenediphosphonic acid-based composition, sulfamic acid, isopropyl alcohol, nonionic wetting agent based on oxyethylated fatty alcohols, and optical bleacher for acidic media, after which material is squeezed, held in closed space during 18-26 h, and washed. EFFECT: improved quality of whitening due to assured undamaged state of fibers. 2 tbl, 5 ex
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