Is a specific treatment that tones down the yellow hues in hair that has a grey coverage of over 50%. Thanks to its active ingredients it washes and softens with an antistatic action. It eliminates yellow blemishes thanks to the effect of a particular macromolecule that makes the hair surface homogeneous and eliminates false reflections. INSTRUCTIONS FOR USE: to be used as a normal shampoo. The application time varies from 2 to 5 minutes depending upon necessity as the substance needs time to deposit on the hair structure.