摘要：

A method and kit for permanently dyeing hair is provided which includes subjecting said hair to a number of treatments having a set time interval between each two consecutive such treatments. The method and kit utilize a colorant composition with a part A and part B. The overall composition will contain an ammonium carbonate or carbamate salt in combination with a chelant, the latter being present at levels of at least 1%. The combination of ammonium salts and chelant achieve reduced hair damage, enhanced color deposition and enhanced bleaching. Particularly preferred is a combination of ammonium carbonate and ethylenediaminetetraacetic acid salt.

展开