METTLER TOLEDO weigh paper is smooth with a flexible surface for contamination-free sample transfer through funnels or chutes to help prevent sticking and minimize waste and spillage. Semi-Opaque, High-Gloss, Milk-White 3"x3" Calendared Cellulose Paper. Food Safe and 21 CFR Parts 176 and 177 Compliant. 100% Wood Pulp and Biodegradable. Not Treated with Silicone or any Other Surfactant.