Both-side coated paper comprising kaolin for usE of printing

In the both-side coated paper for use of printing made by coating the coating material containing pigments and binders as the main ingredients on the surface of a base paper, drying the applied coating material, and then passing the coated base paper through a high-temperature calender heated above 100.degree. C., a both-side coated paper for use of printing characterized by that the density measured after the finish pursuant to JIS P8118 is 1.15-1.35 g/cm.sup.3, the gloss of coated paper surface measured after the finish pursuant to JIS P8142 is higher than 75%, the smoothness measured by the SMOOSTER under J. TAPPI paper and pulp test method, No. 5A is lower than 20 mmHg, and the mean value L of Clark free protruding lengths in the machine and cross directions measured pursuant to JIS P8143 A can satisfy the following equation (1) below:

• L>1.28X+45, (1)
• where
• L=Mean value of Clark free protruding lengths in the machine and cross directions (mm), and
• X=Product basis weight (g/m.sup.2);
• wherein the outermost coating layer on both sides of said coated paper contains the kaolin as a pigment whose average particle diameter is 0.5-1.0 .mu.m, and content ratio is 50-80 wt % for the particles smaller than 1 .mu.m in diameter and 5% or less than 5% for the particles larger than 3 .mu.m in diameter, in an amount of 40-90 wt % of the total pigment used, and the copolymer latex with a Tg of 25.degree.-50.degree. C. as the binder, in an amount of 5-30 wt % in terms of solid matter of the total pigment contained;
• and
• wherein the coating weight per surface is 15-30 g/m.sup.2 after the coating material is dried.