Choose a shade of American Crew Precision Blend (Light, Medium Ash, Medium Natural and Dark) that matches your natural hair color. Then, mix the color in a 1:1 ratio in a color bowl. In general, about 20 mL/0.68oz will be needed to complete the service on a hair that is 1” long. You should perform a quick allergy test according to the warnings on the color product. Choose from the four American Crew techniques, based on the texture and length of your hair. Each of the techniques can be used with light, medium or heavy product application to provide 25%, 50%, 75% or 100% gray blending. For a natural look, allow gray to peek out at key areas such as sideburns and temples. Perform each technique efficiently, trying to keep the application time under four minutes.Features and Benefits:• Lasts 4-6 weeks (24 shampoos)• Easy to use and apply• Fades to-tone with no brassiness• 5 minute application with natural results• No line of demarcation• 11 services per bottleIngredientsAqua (Water) (Eau), Hydrogen Peroxide, Cetearyl Alcohol, Amondimethicone, Cetrimonium Chloride, Trideceth-12, Cetyl Alcohol, Ceteareth-60, Ceteareth-23, Pentasodium Pentelate, Methylparaben, Phosphoric Acid, Sodium Stannate.