How to make Liquid Hand Soap from Scratch • Lovely Greens
Testing liquid hand soap. Liquid soap making is much more tricky than cold-process soap making because of the lye. With KOH being only 90% pure, it can cause your soap to be lye-heavy, and harsh on the skin, or overly superfatted and cloudy. You can have everything measured correctly and this can still happen because of the lye’s 10% wild card.