Bigen Permanent Powder Hair Colour – No 56 Rich Medium Brown Bigen Permanent Powder Hair Colour is ideal for colouring all grey or partially grey hair. No Ammonia No Hydrogen Peroxide Easy to use (simply mix with water) Very gentle to hair (low in pH) Long lasting, with beautiful and true-to-life colours No harsh odours Gives hair a smooth, rich and natural look Bigen water-activated permanent hair colour is ammonia free, and requires no hydrogen peroxide. It colours your hair without lifting (lightening) action, and with less damage than other ordinary hair colour products with similar action. It’s the gentle choice. How do I select the right Bigen colour for me? Always choose the Bigen colour that is closest to your own natural colour (or 1 to 2 shades lighter) for best results. Is one bottle of powder enough to cover all my hair? 2.3 fl oz. of mixture is obtained when you mix a full bottle of powder with 5 measuring cups of water. This amount is good enough to cover from short hair to shoulder-length hair. You may need 2 bottles if you have long hair.