Sky Morn Indigo leaf powder is a natural colourant. Indigo is natural and derived from Indigo plant and can be used to colour hair naturally . Subh Selection Indigo leaf powder is a quality oriented product and is absolutely safe and free from chemicals and preservatives. Indigo application for hair colour has no side effects .Indigo can be applied by mixing with henna and can be applied separately as well.Do not get confused with the hardness of the packing .This product comes in a vacuum packing which appears to be hard or wet but once you open the pack you will find the original powder form only .Vacuum packing increases the shelf life of the product by protecting it from external air and temperature . How to mix indigo for hair Place amount of desired dry indigo powder into a bowl. Add enough warm water to the powder to make paste the consistency of pudding. Stir well, until all of the lumps are gone, then immediately apply to the hair. You may need to add more water as you are working with the paste, as it will thicken as it sits. Wrap head in plastic wrap, then place a shower cap over the top of that. Leave the paste on the hair for the following amount of time to achieve the desired colors: Black - leave on for 45 minutes to 1 hour Brown - leave on for 15 to 30 minutes, depending on how deep you want the brown to be. Rinse the paste out. Do not shampoo for 24 to 48 hours, as the indigo will need time to oxidize.