Laboratory Pumice Powder, Coarse 0-3/4, 50lb. Bottle. Facilitates stain removal. Prevents plaque formation. Improves color stability. Dental Pumice promotes smoothening, cleaning, and polishing of acrylic dentures and natural teeth. Its abrasive surface effectively removes stubborn stains to create a smooth finish.Achieve superior cleaning performance with the pumice's gritty surface that protects against plaque for healthier teeth. Maintain the naturally-looking enamel or acrylic with proven resistance to discoloration from smoking and acids.