L'Oréal Professionnel Dia Light Acidic Gloss Color Booster Violet 50ml visibly improves color results while also neutralizing undertones. Its ammonia-free formula is highly suitable for previously colored or weakened hair, as it simultaneously tones and conditions the strands. Its gel-like texture is easy to apply, gliding through the hair to ensure full coverage. As a result, the hair looks shinier and glossier while the previous color becomes more intense and vibrant. Thus, it can be used after a balayage or a lightning session, to tone down undesired shades, or on following color sessions to refresh the tone of the lengths. And all of that without color overload or over-sensitization. In addition, this product visibly improves color duration for up to 14 washes, mainly due to its nourishing properties that maintain the hair healthy and moisturized. Lastly, it also reflexes L'Oreal's environmental commitment, as it uses less water and lasts longer than traditional hair colors. Perfect for the planet and for sensitive or colored hair. Characteristics Violet; Enhances previous color and shine, neutralizes undertones, no sensitization color overload; Refreshes the lengths; For sensitized hair; Up to 14 washes; Ammonia free. Precautions DEVELOPED FOR PROFESSIONAL USE ONLY. How to use As a product developed for professional use only, it should not be used at home under any circumstance. Mix L'Oréal Professionnel Dia Light Acidic Gloss Color Booster Violet 50ml with the chosen diactivateur in the appropriate ratio. Apply on dry, unwashed hair and adjust the processing time according to the desired result and hair type. Finally, emulsify and rinse well.