To mix Herbatint Gel and Developer, use the Herbatint measuring cup found in the Herbatint Application Kit to mix equal parts of color and developer. The quantity you use depends on the length and volume of your hair. Note: If you don’t own an Application Kit, you can use a plastic or glass measuring cup, but NEVER use a metal measuring device. Mix with a brush until you obtain a gel-like consistency. Starting at the root, apply the gel to dry, unwashed hair. Tilt your head back while you rinse so that the gel does not get into your eyes. Once processed, rinse hair thoroughly until the water runs clear. Rinse by tilting head back (Do NOT use shampoo for 48 hours). Finally, apply the Royal Cream Conditioner and leave on the hair for five minutes. Rinse again and style as usual.