Spread the colour on to washed and towel dry or dry hair. eave for 15 - 30 minutes. You can leave it little longer for more intense color! Rinse thoroughly with water. It is recommended to use gloves when colouring. Top Tip: Use colour as conditioner for long lasting hair colour! Colour remains about 8-12 washes depending of hair quality. Stronger pigments even 20 washes! Colour remain useable one year after first opening. Keep it in dry and cool place and close the jar carefully.