Thick coated paper

This is the highest quality paper—durable and smooth, so it used for covers and posters. It is also thick enough to prevent bleed through so you can concentrate primarily on descreening and dust cleaning during processing.
Colors vary between prints due to coating differences. Coated papers are allowed to use one special fluorescent color outside of the CMYK range which makes proper color adjustment more difficult.

Thin coated paper

Similar to thick coated paper, but its thinness causes bleed through. Used for magazine posters like Megami or Dengeki Hime and some pamphlets and doujinshi.

Thick uncoated paper

A major paper used for the inner pages of artbooks. It doesn't have bleed though, but its roughness causes some paper texture from the physical shadows.

Thin uncoated paper

A cheap paper mainly used for magazines. Both bleed though and paper texture noise are higher than all others mentioned above.

Other

There are many type of papers not covered by the previous four, such as special textured pages used by many doujinshi.

Updated by midzki about 14 years ago