Shampoo for Color-Treated Hair The non-gesceridine, vitamin E, provitamin B5 and UV filter found in the shampoo composition provide all the necessary protection for colored hair to allow you to keep a bright tone up to 6 weeks after hair coloring. Apply shampoo to damp hair, foam and thoroughly wash. If necessary, repeat. Then use an air conditioner or mask appropriate to your type of hair. Gently cleans dyed hair. Prevents color rinse and increases its durability. Helps to preserve the brightness and uniformity of the tone for a long time. It looks after the hair and softens them, giving them an amazing shine. It protects the hair from the harmful effects of UV rays.