Preference Luminous Cool Blondes 9.12 Very Light Ash. The translucent gel formula gives your hair a blonde shade with luminous cool reflects and intensifies the natural nuances of your hair color. Discover the unique cool blondes of preference with light- reflecting dyes, for a luminous and sophisticated color. Direction To Use: STEP 1 – Before Applying: Remember to be colour safe and always do your patch test 48 hours before use, even if you have already used colouring products before. Please follow the instruction leaflet and read the safety information. STEP 2 – Prep: Cover your shoulders with a towel and put on the gloves. Open the colouring bottle and pour it entirely into the developer bottle. Close with the applicator tip and shake it to obtain a completely even mixture. Twist off the applicator tip immediately to avoid bursting and damage from the product overflowing. STEP 3 – Apply color: Part your hair into small, even sections and apply the colour. Refer to instructions for development time. Apply conditioner and then rinse thoroughly.