| 摘要 |
PROBLEM TO BE SOLVED: To obtain bulky printing paper with high surface strength and good printability. SOLUTION: The bulky printing paper is obtained by compounding 40-100 wt.% of mechanical pulp and adding 0.3-1.6 wt.% of a cationized starch and 0.4-3 wt.% of a cationized PAM(polyacrylamide) respectively so as to be 0.45-0.7 g/cm<SP>3</SP>in paper density. Thereby, the objective printing paper having bulkiness in quality is obtained. The printing paper thus obtained has no problem in practical machine printing with a white spot area percentage of 30 mm<SP>2</SP>/m<SP>2</SP>or less measured at 140% threshold value using a contaminant impurity tester in terms of surface fiber tear-off level determined by an RI printing tester even if undergoing any clear coating. COPYRIGHT: (C)2005,JPO&NCIPI
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