Coated paper adds a mineral-pigment layer that creates smooth glossy or matte surfaces and makes color print look crisp. This buyer’s guide walks notebook teams through C1S vs C2S, gloss vs matte, how to pick the right GSM for covers and inserts, and when to choose coated vs uncoated for writing and readability. It also outlines finishing options (lamination, soft-touch, foil, spot UV), typical cost drivers and MOQs, and the sustainability standards that matter (FSC, ISO 9001