American Crew Precision Blending Developer - 15Vol|4.5%

Developer 4.5% is recommended to be used together with Precision Blend grey hair dye in shades Blonde, Medium Natural, Medium Ash and Dark Natural to achieve optimal results for covering grey hair. Before use, do not forget to test to identify an allergic reaction.

How to use: Choose a Precision Blend shade that is closest to your natural hair colour. Mix Peroxide 4.5% with Dye in a 1:1 ratio. For short hair, 10 ml of activator and 10 ml of dye are enough. Next, depending on the expected result, apply the product to your hair.