When manufacturing paper, the base stock is similar for both coated or uncoated paper. To make coated paper a clay solution is added to the base stock. At this point a sheet is considered to be matte coated. For a gloss coated sheet the matte coated sheet is calendared through a series of smooth metal rollers which polish the clay to produce a very smooth gloss coated sheet. To produce the dull or satin sheets a cleaner base stock is used with heavier coat weights that provide a better print quality than matte coated sheets.