DYE COMPOSITION OF ACIDIC PH COMPRISING 2,3-DIAMINO-6,7-DIHYDRO-1H,5H-PYRAZOLO[1,2-a]PYRAZOL-1-ONE, PARA-PHENYLENEDIAMINE, META-AMINOPHENOL, AND OXIDIZING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a new composition for dyeing keratin fibers, which sufficiently and uniformly gives a red color, a copper color or a mahogany color on natural hair or dyed hair from hair roots to hair tips. SOLUTION: This dye composition for dyeing keratin fibers, especially human keratin fibers, for example, hair, comprises: 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one or its addition salt as the first oxidation base; at least one para-phenylenediamine as the second oxidation base; at least one meta-aminophenol as a coupler; and at least one oxidizing agent, in a proper dyeing solvent, and has a composition pH in a range of 5.5 to 7.5. COPYRIGHT: (C)2008,JPO&INPIT