A SMART ADDITIVE THAT, ADDED TO THE YELLOW COLOR PERMANENT DYE, TARGETS THE ALKALINITY OF THE DYE CREAM BY LOWERING ITS pH TO TRANSFORM IT INTO A TRUE TONE ON TONE. IT ALSO CARRIES OUT A REMINERALIZING ACTION.. HOW TO USE MIXING RATIO COLOR - PEROXIDE 5 VOL.: 1:2 MIXING RATIO COLOR - TONE-ON-TONE CREATOR: 10:1* *ONLY IN CASE OF TONING ON NATURAL HAIR, TO AVOID DISTURBING THE BASE, IT IS RECOMMENDED TO ADD YELLOW TONE-ON-TONE CREATOR IN AN AMOUNT EQUAL TO HALF OF THE COLOR.