No 4.1 Red is ideally suited for of clients with red, colored hair. On light to mid-blonde hair an intensive red is achieved. On dark brown hair, tinting produces a red shimmer. Red is moreover ideal for mixing with other RefectoCil colors. By mixing in some red, the color becomes warmer and is thus particularly recommended for those with warm colorings. ❤ For professional use only. ❤ Please follow included instructions. ❤ Resistant to washing. ❤ Stable colorations last for weeks.