Mix Indigo leaves powder with warm water in a Bowl.If you want darker shade you can add some salt to Indigo Powder,for instance 1 tsp of salt per 100 gms of Indigo Powder.Indigo has to be applied immediately.So do not wait for dye release.Mix indigo powder with water just before you are ready to use it. Apply to the hair and allow the paste to sit for the 2 Hour.