Indigo blue darkener and hair dyeing process

The invention provides an indigo blue darkener, which is prepared from 0.1-99 parts by weight of an indigo blue dyeing agent, 0-99 parts by weight of an alkaline dye additive, 0.01-99 parts of acidicdye additive and 0-99 parts by weight of an oxidizing agent. The application also provides a hair dye...

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Bibliographic Details
Main Author SONG ZIKUI
Format Patent
LanguageChinese
English
Published 26.04.2019
Subjects
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
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Summary:The invention provides an indigo blue darkener, which is prepared from 0.1-99 parts by weight of an indigo blue dyeing agent, 0-99 parts by weight of an alkaline dye additive, 0.01-99 parts of acidicdye additive and 0-99 parts by weight of an oxidizing agent. The application also provides a hair dyeing process utilizing the indigo blue darkener. The multi-layer scales on the surface of the hair are opened at large angles under the alkaline condition and/or high temperature condition, so that large indigo blue dyeing particles are easily absorbed in the scales; black indigo blue oxycarbide orcarbon black is generated in presence of the high temperature alkaline dyeing additive and the oxidizing agent by utilizing the characteristic that an indigo blue dyeing agent is easy to oxidize; theacidic dye additive is added when the temperature decreases, the scales with the flare angles on the surface of the hair are closed under the acidic condition, and the indigo blue oxycarbide is firmlyclamped and fixed in the sc
Bibliography:Application Number: CN201910171616