Two-component agent with a pH gradient function of time and procedure for hair treatment.

Process for treating hair in which, immediately before application, component (A) of a two component product is mixed, which contains at least one acid, a component (B) of the product of two components, which it contains at least one base, modified after mixing the components the pH gradually automatically within 1 to 60 minutes, the hair is treated with the product ready for use and elapsed time of action, is removes hair by rinsing, wherein the solubility of acid and / or base, at 20 degrees Celsius, is less than 3 g per 100 ml of water.