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US 12,357,550 B2Granted
Hair dyeing composition with improved durability
AssigneeKao Corporation
InventorsBernd Nöcker, Steven Breakspear, Fariba Ghiasi, Niu Jian
Life of this patent
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Abstract
A dyeing composition for keratin fibers, including one or more first direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, one or more second direct dyes selected from Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol and salts thereof, and one or more alkalizing agents.
Claims17
A dyeing composition for keratin fibers, comprising:
- one or more first direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof;
- one or more second direct dyes selected from Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol and salts thereof;
- and
- one or more alkalizing agents.
1 more element
A method for dyeing keratin fibers, comprising:
- applying a first aqueous composition onto the keratin fibers having a pH in a range of 7 to 12 and comprising one or more first direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, and one or more alkalizing agents;
- leaving the first aqueous composition onto the keratin fibers for a time period in a range of 1 min to 60 min, and optionally rinsing-off the keratin fibers and optionally drying the keratin fibers;
- applying a second aqueous composition onto the keratin fibers having a pH in a range of 3 to 12 and comprising one or more second direct dyes selected from Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol and salts thereof, and one or more alkalizing agents;
- and
- leaving the second aqueous composition onto the keratin fibers for a time period in a range of 1 min to 60 min, optionally rinsing-off the keratin fibers and optionally drying the keratin fibers.
2 more elements
A kit-of-parts for dyeing of keratin fibers, comprising:
- a first composition comprising one or more first direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, and one or more alkalizing agents;
- a second composition comprising one or more second direct dyes selected from Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol and salts thereof, and one or more alkalizing agents;
- and
- optionally an aqueous oxidizing composition having a pH in a range of 1 to 6.
1 more element
Dependencies are inferred from the claim text.