Use in cosmetic compositions of amphoteric surface-active agents for precipitating cationic polymers in the diluted state

A process for precipitating a hydrosoluble or hydrodispersible cationic polymer derivative of a polysaccharide comprised in a transparent aqueous cosmetic composition for the hair or skin, intended to be rinsed, comprising the steps of:

• a) preparing a cosmetic composition comprising:
• at least one amphoteric surfactant in a quantity of about 0.5% to 10% by weight, with respect to the weight of said cosmetic composition, and
• at least 90% of the weight of said transparent aqueous cosmetic composition comprising an aqueous phase whose 8% to 20% of its weight being a system formed by at least one anionic surfactant, at least one surfactant selected from the group consisting of betaines and at least one hydrosoluble or hydrodispersible cationic polymer derived from a polysaccharide;
• wherein the aqueous phase is constituted by said system in aqueous solution in a concentration of 8% to 20%, presents a transmittance measured at 600 nanometers, of at least 90% and does not phase separate with formation of a precipitate on dilution, and wherein said aqueous phase exhibits phase separation behavior with formation of a precipitate on dilution in the presence of said amphoteric surfactant, and then
• b) diluting said composition during application of to the hair or skin.