STEP 1 - WASHINGWash hair carefully with Gentle Wash shampoo before of the coloring service avoiding to rub scalp. Eliminate the excess of water.STEP 2 - BLENDMix the coloring product with the Developer or Catalyst ratio 1/1 (eg add 60ml 60ml color developer or Catalyst) using an electronical scale grams. Leave on for the recommended laying time.STEP 3 - APPLICATION OF COLOURApply the mixture to take root in laying 35 to 45 minutes depending on the amount of gray hair, and if necessary, apply the product by the length.REGROWTH RETOUCHApply blend only on roots not more than 2cm. from scalp .Leave on up to 25 minutes and then apply remaining blend on previously wet hair with warm water .Leave on for 10/15 minutesSTEP 4 - RINSINGRinse product by adding water and massage well hair and scalp and continue adding water until you get an homogenous cream. Clean carefully using a humid sponge to clean skin parts . Then rinse abundantly.STEP 5 - ACIDIFYINGApply Conditioner massaging hair and scalp using hands to eliminate all alkaline and oxidant residuals.Leave on for 3 minutes. Then distribute product with a comb and leave on for another 2 minutes. This product instantly give back the natural smoothness to hair leaving it shiny soft.