Natro Canada hair dye with collagen, ocean floor blue 6.90

Nitro Canada hair dye with collagen, blue ocean floor Description Effective formula: contains a very small amount of ammonia enhanced with collagen that penetrates the hair layers during the coloring process, to treat damaged hair from the inside out. Collagen serum works to nourish the hair and makes it softer. Usage method Color pulling system: mix a quantity of hair bleaching cream in a non-metallic bowl with double the amount of oxidant cream with collagen serum, then mix well. Divide the hair into four sections. Apply the product to the hair and keep it 1 cm away from the roots at all times. Leave the product on the hair for 30 to 40 minutes (depending on the desired degree of bleaching), then rinse thoroughly with water.