My grandparents chanced on some cheap soap in their house while cleaning. They obviously won't use it to shower, but does the abrasiveness mean that they're more potent? To wit, what exactly do the following chemical properties imply for their use?
Cheap soaps are very harsh and strip away the oil/waxy protective layer of skin, making it sticky (preemies have sticky skin because they don't have that protective layer).
Cheap soaps are made with high lye content, petroleum products and other chemicals.