Creating foamy, bubbly, lathery™ facial cleansing grains: Choosing other powders, like clay and starches, and testing the pH (part four)

In part one, we took a look at the formula for a foamy, bubbly, lathery™ cleansing grains with botanicals and powdered surfactants and vitamins and so much more. In part two, we looked at the solid surfactants we might choose for this product. In part three, we considered a few humectants and botanical extracts. In this…