Ideal for extreme, rapid lightening up to 9 tones. It works accelerated (maximum lightening speed in the first 30 minutes). Used in synergy with Charcoal Ash Toner it allows to obtain pure-grey blond results. Enhanced with Ash Micropigments. Enriched with a special protective and strengthening factor for a greater conditioning effect on the hair. It can be mixed with ECHOSLINE hydrogen peroxide at 7 vol (2.1%), 10 vol (3%), 20 vol (6%), 30 vol (9%), 40 vol (12%)