What’s Your Optimal PH for a shampoo with a smooth feeling
I would like to know your opinion for the PH.
Different Surfactant Systems need different PH, I know. Many formulations from suppliers have a PH range from 6 to 7. Even repair, Color shampoos. What do you think about this? in my formulations, the best thickening stability is about PH 6.
the most literature says, that a ph 5 to 5.5 is optimal. What is your experience in relation to slip, care, color care etc.?
thank you very much for your answers