| 摘要 |
<p>A novel hair dye is provided which does not cause allergic reactions and which has good colouring properties. The dye is based upon melanin precursors, which typically give rise to allergic reactions from many users. In the present invention, there is provided, as a cutting agent, a first component comprising dithiothreitol or dithioerythritol or both; as a dye composition, a second component comprising a conventional natural melanin precursor and at least one compound selected from the group consisting of 5-hydroxyindole 1 methyl-5,6-dihydroxyindole-2-carboxylate, tyramine, dopamine, 6-hydroxydopamine and pyrocatechol; as an oxidizing agent, a third component comprising a persulfate compound; and a further oxidizing agent consisting of tyrosinase which is admixed with either said second or said third component.</p> |
