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US 2026/0248257 A1Published application
Hair dyeing method
AssigneeL'oreal
InventorsGabin VIC, Melissa LIAUZUN, Valeria NUZZO
Life of this patent
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Abstract
The invention relates to a cosmetic hair dyeing method comprising at least the steps consisting in: (a) applying to at least one lock of hair an aqueous dyeing composition comprising one or more oxidation dyes and one or more nitrogenous alkaline agents, (b) exposing the hair impregnated with the dyeing composition to microwave radiation.
Claims21
1-17. (canceled)
A method for dyeing hair, comprising:
- (a) treating the hair by applying to the hair an aqueous dyeing composition (a1) comprising:
- one or more oxidation dyes and one or more nitrogenous alkaline agents;
- and
- (b) exposing the treated hair to microwave radiation.
1 more element
An assembly for dyeing hair comprising:
- at least one dyeing composition comprising one or more oxidation dyes and one or more nitrogenous alkaline agents;
- and
- a device configured to expose the hair to microwave radiation with a frequency ranging from 500 MHz to 300 GHz.
Dependencies are inferred from the claim text.