Suitable for bleached, blonde, streaked or gray hair. Formulated with a special violet pigment that neutralizes undesired yellow reflections, leaving hair soft, shiny and silky. The No Yellow Mask can be used on its own or in conjunction with the shampoo. This mask is designed to tone unwanted yellow tones at the same time as locking down the cuticle leaving the hair soft and shiny. This mask is ideal to be used with perming, straightening and keratin treatments as there is no sulfate in this product. The processing time is 1-5 mins depending on the intensity you and your client desire. How to Use: After washing the hair with the anti-yellow Shampoo, put on disposable gloves and apply to the lengths and ends of towel-dried hair. Leave on for 3-5 minutes and rinse carefully.