First, analyze the hair with a texture test to determine the exposure time and technique to be applied. Then, in a non-metallic container, place 1 x 25g spoonful of powder for every 75g to 85g of 3, 6, 9 or 12% oxidizing cream, depending on the technique to be applied. Exposure time from 15 to 35 minutes, visually controlling the evolution of the product on the hair.