Hello, usage rate
สารชะล้าง approximately 25-35% in the formula, depending on the desired cleaning efficiency. (Recipes don't always require high cleaning performance. For example, if making a gentle cleanser, you might use
สารชะล้าง only 15-20% total)
SugarThick choose according to the thickness of the formula you want
Phenoxyethanol SA use 0.5-1.0%
Panthenol recommended 0.5-1.0% should not exceed 1% which will cause a sticky head (recommended only 0.5%)