Two-component peroxide hair bleaching compositions

A two-component composition for bleaching hair comprised of:

• I. a first component consisting essentially of an admixture of:
• (a) 0.1 to 10 percent by weight of a guanidine derivative of the formula:
• ##STR31## wherein R is a member selected from the group consisting of hydrogen, the radical ##STR32## and the radical ##STR33## Y is a member selected from the group consisting of hydrogen, the NH.sub.2 radical, and an alkyl radical having 1 to 4 carbon atoms, and n is the integer 2 or 3, or a water soluble acid addition salt thereof,
• (b) 1 to 20 percent by weight of an ammonia-free alkalinization agent in an amount sufficient to give the composition a pH of 8-10.5,
• (c) 0 to 20 percent by weight of ethylene diurea,
• (d) 0 to 0.01 mole/liter of heavy metal cations,
• (e) 0 to 10 percent by weight of thickening agents,
• (f) 0 to 10 percent by weight of surface-active agents,
• (g) 0 to 2 percent by weight of additional conventional ingredients, and
• (h) 0 to 70 percent by weight of solvent;
• and
• II. a second component for admixture with said first component consisting essentially of an admixture of:
• (a) 2 to 8 percent by weight, calculated as hydrogen peroxide, of a peroxide oxidation agent,
• (b) 0 to 0.1 percent by weight of a peroxide oxidant stabilizer, and
• (c) up to 70 percent by weight of solvent, the total amount of solvent in both components being from 10 to 70 percent by weight.