If in the formula we make lotion does not have heating parts, we can use caffeine pour into Ethy. Alcohol can be heated to dissolve well and then poured into the recipe, right?
If using substance caffeine in the 0.5% lotion formula, how many % solvent should we use? Ethyl Alcohol 50%:water 50% here is take แอลกอฮอล์ with water half and then dissolved. caffeine ? Stir to dissolve and then pour into the mixing process. Or do I need to heat it? Thank you.
