Hair dyes containing pyrazole and/or substituted triazine oxidation dye precursors give more brilliant and intense shades when dihydroxy acetone, alloxan, methyl glyoxal or potassium iodide is present

摘要

Hair dyes containing pyrazole (or a derivative such as a water-soluble salt) and/or a substituted triazine as a water-based oxidation dye precursor also contain 0.0001-5 wt.% (based on total composition wt.) of dihydroxy acetone, alloxan, methyl glyoxal and/or potassium iodide.