anvaendning of 2,4 - diamino - 1,3-dimethoxybenzene or one of its salts, which kopplinsmedel together with foeregaangare foer oxidationsfaergaemnen foer to faerga maenniskohaar,faergkomposition foer haar innehaallande this kopplingsmedel and foerfarande foer framstaellning of kopplingsmedlet

摘要

The invention relates to the use, by way of a coupler, of 2,4-diamino-1,3-dimethoxybenzene or one of its addition salts with an acid, in combination with at least one oxidation dye precursor of the para type, for dyeing keratinous fibres and especially human hair. The hair dyeing compositions according to the invention contain, in a cosmetically acceptable aqueous vehicle, 0.05 to 3.5% by weight of 2,4-diamino-1,3-dimethoxybenzene or one of its salts, which imparts to the hair strong blue colorations when it is combined with p-phenylenediamines or red colorations when it is combined with p-aminophenols, in an oxidizing alkaline medium.