Hello, will both substances irritate the skin? Depending on the pH value, it can irritate the skin. The level of irritation depends on how high the pH is. If the pH is adjusted close to 7, there is no irritation problem.
Triethanolamine pH is easier to control as it is less alkaline.
Sodium Hydroxide is easy to add in small increments and
วัดค่า pH or observe the solubility of the ingredients. Isn't there any difference?