To provide a lightweight offset printing paper obtained by using a waste paper pulp as a main raw material, having high opacity, providing excellent printed gloss, and having excellent printing suitability such as ink set properties, and piling in cold set printing.
The printing paper has a base paper containing 1 mass% or more of filler having a bulk specific gravity of 0.25 g/cm3 or less, coating the surface with a treating agent regulated so that the rate of an adhesive to 100 pts.mass pigment may be 30-150 pts.mass so as to be 0.5-3.5 g/m2 per one surface, drying the coated product, and subjecting the dried product to smoothening treatment at a temperature of a rigid roller of 100C or more, nipping linear load of 300 kN/m or less, and at nipping width of 50 mm or larger so as to provide Oken-type smoothness of smoothness of the coated surface of 50 sec or more.
IMAI MAYUMI
YOKOUCHI HIDEYUKI
YAESAWA TAKASHI
WATANABE KUNIHIKO
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