White and Light Color Intensifying Shampoo. Deeply cleans white and light colors, effectively removing dirt and yellowing. It does not contain chemical bleaches. It is very gentle, with a special formula enriched with glycerin that allows for exceptional whiteness while fully protecting the coat. It is recommended to first wash with Poils Courts shampoo (formerly Essentiel Proteine), followed by a second wash with Poils Blancs shampoo, which should remain on the coat for 2-3 minutes. You can also wash twice with a color-enhancing shampoo. After rinsing and drying the coat with a towel, apply the Apres-shampooing Poils Blancs conditioner. Usage: The full effect of the color-enhancing shampoo is achieved after 3-5 baths performed within 2-3 weeks. The color-enhancing shampoo is not a dye; its action is based on intensifying pigment using natural plant-derived ingredients. It can be used for multicolored coats by applying the appropriate shampoo for the color that needs enhancement. There is no concern that the quality of other colors will deteriorate.