| abstract |
FIELD: cosmetic industry.SUBSTANCE: group of inventions relates to hair coloring and bleaching. Method of dyeing or bleaching hair involves applying to hair a composition comprising a dyeing agent or a hair bleaching agent; and simultaneous application to hair of a composition comprising compounds of one or both of formulas given below:, in which R1-R4independently denote hydrogen, a hydrocarbon radical containing 1–10 carbon atoms or a hydroxy group, R5and R6independently denote hydrogen or an aliphatic hydrocarbon group substituted with at least one hydroxy group; R'1-R'4independently denote hydrogen, a hydrocarbon radical containing 1–10 carbon atoms or a hydroxy group; R'5and R'6independently denote hydrogen or an aliphatic hydrocarbon group substituted with at least one hydroxy group, except for the case when R'5and R'6simultaneously denote hydrogen atoms. Also disclosed are a set and use of the method for bleaching or dyeing hair.EFFECT: group of inventions provides increasing color intensity, reducing hair damage and repairing damaged hair.8 cl, 1 dwg, 5 tbl, 6 ex |