Wella Colour Charm Permanent Liquid Hair Toner with Liquidfuse Technology saturates, penetrates and fuses with the hair to deliver vibrant color that is exceptionally fade resistant. The extra mild formulation is ideal for creating delicate shades of blonde like platinum and beige and neutralizing unwanted warmth after lightening. Great for toning pure double processed blondes. Vibrant, long-lasting, fade-resistant results Long-lasting, true-to-tone color Economical 1:2 mix ratio How To Use Pre-lighten the hair to desired level before applying toner. Mix 1 part Wella Colour Charm toning color with 2 parts 20 volume Wella Colour Charm developer. Apply to towel dried hair then, develop for up to 30 minutes. Check frequently to see if desired results are achieved. You can customize the toner formula by intermixing shades. For example, if you want a shade that is in between an ash tone and a warm tone, try mixing equal parts of T-18 and T-14 with equal parts of T-11 or T-35.