Cosmetics Formulation Development

Please inquire Fit up the sunscreen formula based on this ingredient. And after about 1 week, the cream when applied on the skin will be harsh. I'm not sure what caused it. The ingredients are as follows: Water Polyacrylamide&c13-14 Isoparafin&laureth7 Ensulizole Bisoctrizole Natural Betaine Moist 24 DHHB OMC Vitamin E Phenoxyethanol

Hello, probably due to incomplete dissolution of Some สารกันแดด , guess DHHB I don't know if the member uses it. DHHB and OMC how many %?

DHHB 2% OMC 5%

Hello, in the mixing process How many degrees of high heat do you use to melt the ingredients together, especially DHHB

about 70 degrees

Hello, the problem is caused by 2 things. 1. Solvent DHHB is not enough, increase the proportion of OMC 2. The melting temperature Not high enough, preheat at 80 degrees to make sure DHHB completely soluble.