Dry shampoo is actually not a shampoo as it will not clean your hair from oil and dirt. The purpose of the product is to reduce oiliness on the scalp and increase the time between washes.

Some comments on the ingredients used in the formulation:

Rice starch: can be replaced with other starches like potato starch, corn starch etc. Starch works oil absorbing.

French pink clay is known to absorb excess sebum and impurities, is very soft and therefore suitable for sensitive scalps.

Multani mitti clay absorbs excess sebum and rebalances the scalp.

Rhassoul clay is known to absorb excess sebum and impurities. It brings volume to the hair.

Hydrolyzed protein (powdered) is volumizing and film-forming.

Green tee powder is used in cases of tired hair, a sensitive scalp, hair loss, combination hair with a tendency to become oily quickly.

Peony powder: peony is known to soothe scalp as well as for its anti-free radical active ingredients.

Neem powder: soothes irritated scalp.

Orange essential oil is used as a fragrance and can be replaced with any other essential oil of your choice.

Of course, you are free to use any clays and powders of your preference. By choosing the clays and powders, I would suggest to make sure that the most of them have beige, pink or any other neutral colours in order to prevent ending up with the green-coloured hair. 

INCI: Oryza sativa starch, Moroccan lava clay, Illite/Kaolin, Camellia sinensis, Azadirachta indica, Paeonia officinalis, Solum fullonum, Hydrolyzed wheat protein, Citrus aurantium dulcis (Orange) Peel Oil

Formulation procedure:

Blend all components of Stage A together.

Essential oils can be added last and mixed in thoroughly until combined together with the powders. Put the final product into a jar with a sifter insert.

How to use:

Apply to your roots with a fluffy makeup brush to avoid white splotches of powder. Or simply sprinkle it near your scalp and rub it in with your fingers.