OFFSET PRINTING PAPER

摘要

A surface-treating agent mainly includes three constituents: a water-solub le polymer; a surface sizing agent which is a copolymer of a styrene type monom er and an anionic monomer and which mainly includes a water-soluble copolymer containi ng 20 to 80 weight % of the styrene type monomer; and a surface sizing agent which is a copolymer of an olefin type monomer and an anionic monomer and which mainly includes a water-soluble copolymer containing 20 to 80 weight % of the olefi n type monomer. The surface-treating agent is coated and dried on a base paper for offset printing.