| abstract |
PURPOSE:A hair dye, containing 5-dihydroxynaphthalene and 2,4-diaminophenol as active ingredients and capable of coloring by oxidation with air and dyeing the hair to a natural hue, having improved dyeability, color fastness to daylight exposure and resistance to washing with ready usage. CONSTITUTION:A hair dye containing 2,4-diaminophenol and 1,5- dihydroxynaphthalene or a salt thereof as active ingredients. The amounts to be blended are preferably within 0.1-5% range respectively in view of hue and dyeability (density of color). If the blending ratio of the 2,4-diaminophenol is increased, the hue becomes brown. If the blending ratio of the 1,5- dihydroxynaphthalene is increased, the hue becomes black. The composition of the hair dye is particularly preferably the form of an aerosol product, etc., having improved preservation stability. Another dye, e.g. nitro dye, disperse dye, acid dye, etc., may be further blended to the combination recipe of the above-mentioned active ingredients for toning. |