For centuries, colloidal oatmeal has been a salve for itchy, dry, or irritated skin. This natural ingredient is readily found in cosmetic products like moisturizers, shampoos, and shaving creams.

“Colloid” means that something is dissolved in another substance. Colloidal silver is made up of tiny particles of silver in water. It’s the same kind of silver used in jewelry and silverware. The ...

THE process of dialysis is so widely used for the purification of colloids that one would expect to find some general treatment of it in a book of this size dealing with ‘theory and methods.’ ...