I read the article on body wash composition, but I still need some help here!!!
I formulate a liquid soap based on the classic recipe (oil + KOH + citric acid to reduce the pH). I noticed that without any additional compounds, the odor and the color of the liquid soap change or diminish by time. Also the foam is not that rich and the pH is only reduced up to 9. Is there any surfactants or any other additives :
To stabilize the odor and color To further reduce the pH to 7 or belowTo increase the foam.
And in which percentage w/w or w/v ?
Finally, all the additives (surfactants or colorants or chelants or thickening agents) are all added at the final product or during saponification and in which stage?
Thank you for your response.