I tried mixing สีละลายน้ำ into the gel and it came out reddish brown. But after leaving it for a while overnight, it turns out to be green. And in this baking, what substance do we need to add? to keep the color stable, thank you
Hello, to increase the stability of สีละลายน้ำ 1. Use Benzophenone-4 at a rate of approximately 0.1-0.5% (test to see if any level is sufficient) 2. Check Check the pH of the formula. It must not be too acidic. and not alkaline