Coloring composition for keratin fibres comprising a system...

Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing

Reexamination Certificate

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C008S424000, C008S600000, C008S628000, C008S629000, C132S202000, C132S208000, C424S070100

Reexamination Certificate

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11326513

ABSTRACT:
Described is a method of reducing transcutaneous passage of an orthodiphenol oxidation dye by adding a catalytic system of Mn(II) or Zn(II) salt or oxide and at least one alkaline or alkaline earth hydrogenocarbonate to the orthodiphenol oxidation dye composition.

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Database WPI; Section Ch, Week 197901; Derwent Publications Ltd., London, GB; XP002230065 & JP 53 133641; Nov. 21, 1978.

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