Methods for preparing hair coloring compositions
View Patent ↗Methods for providing, at the discretion of the user, at least two different oxidative hair coloring compositions providing different level of lift based on a single tint component. The methods involve the use of a tint component, an oxidizing component and a third component comprising a non-ammonia alkalizing agent. The compositions may comprise little or no ammonia.
1. A method for making an oxidative hair coloring composition, said method comprising the steps of:
providing a tint component and an oxidizing component, said tint component comprising a first non-ammonia alkalizing agent and oxidative primary dyes, and
mixing the tint component and the oxidizing component with a third component comprising a second non-ammonia alkalizing agent to make the oxidative hair coloring composition.
2. A method according to claim 1 wherein the oxidizing component comprises from 6 to 9 percent of hydrogen peroxide by weight of the oxidizing component.
3. A method according to claim 1 wherein the tint component, the oxidizing component and the third component are mixed in a 1:1:1 weight ratio.
4. A method according to claim 1 wherein the concentration of the second non-ammonia alkalizing agent in the third component is higher than the concentration of the first non-ammonia alkalizing agent in the tint component.
5. A method according to claim 4 wherein the tint component and the third component are free of ammonia.
6. A method according to claim 1 wherein the third component does not comprise oxidative dye precursors.
7. A method according to claim 1 wherein the weight ratio of alkalizing agent to oxidizing agent in the oxidative hair coloring composition obtained by mixing the tint, oxidizing and third components is higher than 1.1.
8. A method according to the claim 7 , wherein the oxidative hair coloring composition further comprises less than or equal to 3.0 by weight percent oxidizing agent.
9. A method for making at the discretion of the user either a first oxidative hair coloring composition or a second oxidative hair coloring composition, said second oxidative hair coloring composition having a relatively higher lift than said first oxidative hair coloring composition, said method comprising the steps of:
providing a tint component comprising a first non-ammonia alkalizing agent and oxidative primary dyes, and
mixing the tint component with a first oxidizing component to obtain the first hair coloring composition; or
providing a third component comprising a second non-ammonia alkalizing agent, and mixing the tint component with a second oxidizing component and the third component to obtain a second hair coloring composition having a relatively higher lift than the first coloring composition.
10. A method according to claim 9 wherein the concentration of the second non-ammonia alkalizing agent in the third component is higher than the concentration of the first non-ammonia alkalizing agent in the tint component.
11. A method according to claim 9 wherein the tint component and the third component are free of ammonia.
12. A method according to claim 9 wherein the first oxidizing component and the second oxidizing component both comprise hydrogen peroxide as an oxidizing agent.
13. A method according to claim 9 wherein the second oxidizing component has a higher concentration of oxidizing agent than the first oxidizing component.
14. A method according to claim 9 wherein the third component does not comprise oxidative dye precursors.
15. A method according to claim 9 wherein the tint component is mixed with the first oxidizing component in a 1:1 weight ratio to obtain the first hair coloring composition, and wherein the tint component, the second oxidizing component and the third component are mixed in a 1:1:1 weight ratio to obtain the second hair coloring composition.
16. A method according to claim 9 wherein the weight ratio of alkalizing agent to oxidizing agent in the second oxidative coloring composition is higher than 1.1.
17. A method according to claim 16 , wherein said second oxidative coloring composition further comprises less than or equal to 3.0 by weight percent oxidizing agent.