38V Zero Vitality's Activator The Zero color range is made up of 3 specific vegan activators. Formulation with 82 to 86% natural ingredients for Zero activators. Enriched with PCA, Zero Activators have been formulated to work in synergy with Zero Color. They are distinguished by their delicate flowery scent. 3 benefits of using Zero Activator with Vitality's Zero Hair Color: Bright and nuanced color Perfect coverage of white hair Limited risk of irritation and allergies Application : 1 / Mix 1: 1 for a denser cream and easier to distribute on the hair and obtain professional results. Choose the right activator: 18 volumes to cover and lighten in a tone 25 volumes to cover and lighten one or two tones 38 volumes to lighten 3 or 4 tones 2 / Apply the mixture by finely separating the strands 3 / Apply in a thick layer by depositing the creamy mixture on the hair, without spreading it with a brush. 4 / Leave on for 30 to 45 minutes.