In the shampoo that I want to make, I want to use. น้ำมันหอมระเหย instead of น้ำหอม but I'm afraid that adding too much will cause problems with the formula. The formula I use is from Hong Huat which is considered a general formula. Contains Water 3000 N8000 1000 Cocamidopropil betain 100g COCAMIDE ...
