A method of colouring porous material, especially human hair, is described, which method comprises applying to the material being coloured, in any desired order successively, or simultaneously, a) at least one capped diazonium compound and b) at least one cationic water-soluble aromatic coupling component, under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component.
本发明涉及一种染色多孔材料,特别是人类头发的方法,该方法包括在任何所需的顺序中,或同时,将以下物质逐次或同时涂抹于待染色的材料上:a)至少一种带有帽子的重
氮化合物和b)至少一种阳离子
水溶性芳香偶合剂,条件是最初不会发生偶合反应,然后使存在于材料上的带有帽子的重
氮化合物与偶合剂反应。