The phrase "uncoated paper" refers to a type of paper that does not have a glossy or shiny surface. It is plain and smooth, like regular printer paper, without any extra coating or finish. Full definition
RAYMOND PETTIBON: HERE»S YOUR IRONY BACK, POLITICAL WORKS 1975 - 2013 is superior in its design and reproduction, on uncoated paper stock appropriate to the art, but is also unavoidably reductive. (artbook.com)
In North America, Domtar — the continent's largest producer of uncoated paper — has committed to achieving Forest Stewardship Council certification on 100 percent of the land it owns and manages. (rainforest-alliance.org)
Printer Matthew Squires explained that the material does not absorb ink like uncoated paper, so the ink sits on the surface mimicking the slight elevation of tape. (artinprint.org)