Q&A: Why don’t we use water in shampoo bars?

Photo taken when we were in Paris, France, for In Cosmetics, 2019. The formula is in French, but we can see it has – in order – sodium cocoyl isethionate (SCI), sodium coco sulfate (SCS), mineral water, fragrance (raspberry), fragrance (cherry), and colourant. If you’re a shampoo bar maker, you might note this is a…