1st makeup for your hair L'Oreal Paris. 1 day color. It will take 10-15 minutes to apply the product, depending on the length of your hair and the look you seek. It is applied with your hands. It goes with the first shampoo. Not stain when dry. It is gentle with your hair. For blond hair. Before you start: You will need a towel to protect your clothes and brush or comb. Preparation: On clean, dry hair, detangling and cover your shoulders with a towel. Tip: Once the color is dry can straighten or curl your hair, but avoid using any hair products water-based.