Shampoo hair using warm water and then lightly towel dry. Hair should be slightly damp. Pump 30 ml/1 oz ( six pumps) of b3 Demi Permanent Conditioner into a clean color bowl. Next, add b3 Brazilian Bond Builder and mix thoroughly ( See measurement guide below) - 3.5 ml (1/8 oz) for short/fine or lightly color treated hair - 7 ml (1/4 oz.) for thick/coarse extra dry or very damaged/chemically treated hair Using an applicator brush, apply product throughout slightly damp hair from root tip and comb through. Put hair in a plastic cap and place under dryer on medium to high heat for 15 to 20 minutes. Lightly rinse using cool water and style as desired.