Cosmetics Formulation Development

The proportion is as follows. DI Water 45% L-ascorbic acid 15% Ethoxydiglycol 20 % Propylene Glycol 20% AnyGel , once viscous, mix in a brown plastic bottle and measure Ph value at 3-3.5. Go to the first round normally. But this time after applying for a while until the serum is dry. Will leave a white stain on the skin It's like applying powder. I don't know what caused it. Where should I adjust? Please give advice.

Hello - I don't know if it can be used in combination with other products or not. a clear liquid Or is it a cloudy color?

No, just use it for both face and body. After finding out that it is a powder stain, just use the face mask. It is a clear liquid gel, no sediment, mix and store in the refrigerator. Please let me know more. The gel that spills on the side of the bottle during use When it dries, it crystallizes like salt. Guess for yourself that it is a crystal from vit c or not, I'm not sure, the ratio is 20% according to the above formula.

Hello,

Guess it is a crystal from vit c or not, I'm not sure, the ratio is 20% according to the above formula

from the formula the member stated is 15%. I don't know if it's 15% or 20%.

L-ascorbic acid 20% off DI Water left 40% wrongly posted as a prototype, actually used 20%.

Hello, please mix according to the original recipe. There shouldn't be a problem with white stains. The problem arises from increasing the proportion of L-ascorbic acid is too high.