Casting Crème Gloss Gray Coverage Due to Insufficient Development Time

Gray hair, particularly when it is coarse or resistant, often possesses a tighter cuticle structure that inhibits the absorption of semi-permanent pigments. If the product is rinsed out according to standard timing, the color may not have had adequate time to penetrate or adhere to the hair fiber. L'Oréal recommends that for stubborn grays, users should extend the standard development time by an additional 5 minutes to ensure optimal color deposit.