I tried making hair shampoos for commercial purposes a few months ago and I used a formulation from a manufacturing guide(a book) I bought. My product wasn't smooth and it was separating. I tried it twice again with half the previous measurements but it still came out same way. This is the formulation I used:
Soda ash: 1.25kg
Citric acid: 0.2kg
Sulphonic acid: 0.75kg
Sodium Benzoate: 0.1kg
The method I used for production as stated in the book was to soak the Antisol in water for 48hrs. Soak the soda ash and SLS for 24hrs. Add sulphonic acid to the soda ash. Add the mix to the Antisol. Add EDTA and SLS. Then add citric acid, Glycerine, Sodium Benzoate, Fragrance and colour in that order.
Is something wrong with my formulation or the method of production I'm currently using? I have little knowledge in cosmetic and formulation. I need your advice. Thank you.