Compositions and methods for altering the color of hair

A composition for altering the color of hair comprising:

• (a) a bonding system comprising:
• (i) at least one first bonding agent chosen from lactic acid and/or salts thereof, wherein the total amount of lactic acid and salts thereof ranges from about 0.1% to about 5%;
• and
• (ii) at least one second bonding agent chosen from (a) glycine and/or salts thereof, and/or (b) arginine and/or salts thereof, wherein, if present, the total amount of glycine and salts thereof ranges from about 0.1% to 5%, and wherein, if present, the total amount of arginine and salts thereof ranges from about 0.1% to 7%;
• (b) at least one fatty alcohol;
• (c) at least one fatty acid;
• (d) from about 0.05% to about 5% of at least one alkyl polyglucoside;
• (e) at least one alkalizing agent;
• (f) at least one hair color-altering agent chosen from oxidative dyes, couplers, or combinations thereof;
• (g) at least one solvent comprising water;
• (h) optionally, at least one vegetable oil;
• (i) optionally, at least one thickening agent
• (j) optionally, at least one polyol;
• and
• wherein all amounts are by weight, relative to the total weight of the composition;
• wherein the pH of the composition is greater than 7;
• and
• wherein the composition is essentially free of cationic polymers.

A method for altering the color of hair comprising:

• applying to the hair a hair color-altering composition;
• and
• rinsing the hair color-altering composition from the hair after a leave-in period;
• wherein the hair color-altering composition comprises:
• (a) a bonding system comprising:
• (i) at least one first bonding agent chosen from lactic acid and/or salts thereof;
• and
• (ii) at least one second bonding agent chosen from amino acids and/or salts thereof;
• (b) at least one fatty alcohol;
• (c) at least one fatty acid;
• (d) at least one alkyl polyglucoside;
• (e) at least one alkalizing agent;
• and
• (f) at least one hair color-altering agent chosen from oxidative dyes, couplers, or combinations thereof;
• (g) at least one oxidizing agent;
• (h) at least one solvent comprising water;
• (h) optionally, at least one vegetable oil;
• (i) optionally, at least one thickening agent;
• and
• (j) optionally, at least one polyol;
• wherein the pH of the composition is greater than 7, and
• wherein the composition is essentially free of cationic polymers.