5 Best Charcoal Soaps - Nov. 2020 - BestReviews
A. Charcoal soap should not stain your sink or tub permanently. It may darken clothes and light-colored washcloths. Any soap residue should be rinsed from bathroom fixtures as soon as possible. Q. How much charcoal is in a bar of charcoal soap? A. A charcoal soap bar may contain anywhere from a teaspoon to half a tablespoon of charcoal powder.