Question

what surfactants I need to make detergent bar paste when it is wet?

Answer 1

Synthetic anionic surfactant (e.g., directly esterified fatty acid is ethionate or DEFI) and a lesser level of fatty acid soap (anionic/soap system),alpha or beta hydroxy acid salt (e.g., alpha or beta hydroxy acid salt such as, for example sodium lactate). Amphoteric surfactants can be used (e.g., betaine), and hydroxy acid salt (e.g., sodium lactate) too.