Medium collagen hair dye, from Nitro Canada, black

Effective formulation: Contains a very small amount of ammonia enhanced with collagen that penetrates into the hair layers during the coloring process, to treat damaged hair from the inside out. The collagen serum works to nourish the hair and makes it softer. Method of use: Color removal system: Mix a quantity of hair bleaching cream in a non-metallic bowl with double the amount of oxidizing 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 bleaching level), then rinse thoroughly with water.