Composition for altering the color of keratin fibers
Disclosed are hair color bases, hair color compositions, and methods for altering the color of hair. Hair color bases comprise a buffer system including ammonium chloride, sodium metasilicate, ammonium hydroxide, and monoethanolamine (MEA). Hair color compositions comprise a hair base comprising a buffer system including ammonium chloride, sodium metasilicate, ammonium hydroxide, and monoethanolamine (MEA), and an oxidizing component.
1. A hair color base comprising an alkalizing buffer system, wherein the buffer system comprises, based on the total weight of the hair color base:
from about 3 wt % to about 12 wt % of ammonium chloride;
from about 1 wt % to about 5 wt % of sodium metasilicate;
from about 1 wt % to about 5 wt % of ammonium hydroxide; and
from about 1 wt % to about 5 wt % of monoethanolamine (MEA), and wherein the hair color base has a pH ranging from about 8.5 to about 10.
2. The hair color base according to claim 1 , having a pH in the range of about 9.0 to about 9.5.
3. The hair color base according to claim 1 , wherein the buffer system comprises, based on the total weight of the hair color base, from about 6 wt % to about 8 wt % of ammonium chloride, from about 2 wt % to about 4 wt % of sodium metasilicate, from about 2 wt % to about 4 wt % of ammonium hydroxide, and from about 2.5 wt % to about 4.5 wt % of MEA.
4. The hair color base according to claim 1 , wherein the hair color base further comprises at least one colorant compound.
5. The hair color base according to claim 4 , wherein the at least one colorant compound is chosen from oxidation dye precursors.
6. A hair color composition comprising:
a hair color base comprising an alkalizing buffer system, wherein the buffer system comprises, based on the total weight of the hair color base:
from about 3 wt % to about 12 wt % of ammonium chloride;
from about 1 wt % to about 5 wt % of sodium metasilicate;
from about 1 wt % to about 5 wt % of ammonium hydroxide; and
from about 1 wt % to about 5 wt % of monoethanolamine (MEA);
at least one oxidizing component, and
optionally at least one colorant, and
wherein the hair color base has a pH ranging from about 8.5 to about 10.
7. The hair color composition according to claim 6 , having a pH in the range of about 9.0 to about 9.5.
8. The hair color composition according to claim 6 , wherein the buffer system comprises, based on the total weight of the hair color base, from about 6 wt % to about 8 wt % of ammonium chloride, from about 2 wt % to about 4 wt % of sodium metasilicate, from about 2 wt % to about 4 wt % of ammonium hydroxide, and from about 2.5 wt % to about 4.5 wt % of MEA.
9. The hair color composition according to claim 6 , wherein the hair color base comprises at least one colorant.
10. The hair color composition according to claim 9 , wherein the at least one colorant is chosen from oxidation dye precursors.
11. A method for altering the color of hair, comprising contacting hair with a composition for a sufficient period of time to achieve a desired level of lift of the color of the hair, wherein the composition is formed from mixing (a) a hair color base comprising an alkalizing buffer system with (b) an oxidizing component, wherein:
the buffer system comprises, based on the total weight of the hair color base, from about 3 wt % to about 12 wt % of ammonium chloride, from about 1 wt % to about 5 wt % of sodium metasilicate, from about 1 wt % to about 5 wt % of ammonium hydroxide, and from about 1 wt % to about 5 wt % of monoethanolamine (MEA); and
the pH of the composition ranges from about 8.5 to about 10.
12. The method according to claim 11 , further comprising leaving the composition on the hair for a time period of up to about 60 minutes.
13. The method according to claim 11 , wherein the pH of the composition ranges from about 9.0 to about 9.5.
14. A multi-compartment kit for altering the color of the hair, comprising:
(a) a first compartment comprising a hair color base comprising an alkalizing buffer system, wherein the buffer system comprises, based on the total weight of the hair color base, from about 3 wt % to about 12 wt % of ammonium chloride from about 1 wt % to about 5 wt % of sodium metasilicate, from about 1 wt % to about 5 wt % of ammonium hydroxide, and from about 1 wt % to about 5 wt % of monoethanolamine (MEA), wherein the hair color base has a pH ranging from about 8.5 to about 10; and
(b) a second compartment comprising an oxidizing composition comprising at least one oxidizing agent.
15. The multi-compartment kit according to claim 14 , wherein the buffer system is configured to buffer a mixture of the hair color base and the alkaline oxidizing composition to a pH ranging from about 9.0 to about 9.5.