Kaolin is the mildest of all clays and is used in cosmetic masks and soaps for sensitive skin as well as for dry skin.
Does not expand with increasing water content.
When adding clay to soap, do so just before adding fragrances, stirring the clay into a small amount of soap and then adding back to the soap pot or mix with the water.
Usage rates would vary depending on what one is trying to accomplish, but using too much clay can make a soap gritty.
Kaolin clay is also used as a scent fixative.
This is a fine, fluffy clay that has natural absorbency properties and is frequently found in body powders, body packs, skin care products, and deodorants.
To make a facial clay, add distilled water to a small amount of clay.
Other additives you may add to a facial mask instead of distilled water are plain yogurt, honey, liquid vegetable glycerine, whipped egg whites or mayonnaise.
Apply with clean fingers to clean skin, let dry 15 to 20 minutes, rinse off with warm water, pat skin dry, repeat once a week if necessary.
Clay masks will draw out impurities and toxins and may help with acne and similar skin conditions.