Hello, the formula has several problems as follows. 1. The proportion of water. Probably not enough to dissolve
Vitamin C (L-ascorbic acid) (Ultra-Fine). Correction is to increase the proportion of water. (replace other ingredients) or reduce the rate of use
Vitamin C (L-ascorbic acid) (Ultra-Fine) down to 10-12% 2.
Pro Polymer Silk resistant to acidity up to pH 2, recommend members to try.
วัดค่า pH to determine what the approximate pH of the formula is.
Pro Polymer Silk will have enough stability 3.
Pro Polymer Silk if it works fine. (according to the conditions stated in item 2) will be able to help coordinate
Vitamin E which is oil at a rate of 2%, no problem, fill in the last step. Then blend or stir to combine.