If you have colored hair gray or white, Nashi Argan Silver Shampoo is the absolute best choice for you.Very effective for elimination of yellow tint in the hair.The dark blue / purple, cold pigments in the product would counteract the yellow, warm color of the hair. How to use: Should be applied to the dry hair.Massage it into the scalp and the rest of the hair - possibly a little water is used to distribute the product better.After that, clean your product from the hair in the bathtub. For a more effective effect, leave the product for 2-3 minutes. Caution: >Test the product on the skin before use >Careful with nearby textiles when you use the product because the blue pigments can stain on them. >Do not use the product on eyelashes and eyebrows.