Improvement of Physical Properties and Printability of Wood Containing Paper by Light Weight Coating

In this study, wood containing printing paper was coated by latex with nanoclay and PCC loading for printing improvement at two and four levels, respectively. Scanning electron microscope images confirm partial filling and covering of cavities on the surface of base paper by the coating. Rheological behavior and viscosity of two types of color pigment are quite different and PCC would be better because of lower preparation costs. Results showed that the printing paper coating reduced roughness, porosity and water absorption, so printability and dimensional stability of paper would improve in web offset printing. There is significant difference between gloss and print density of coated paper and control at α= 0.01. Apparently, coated paper with PCC showed better print quality than the control. Printing with IGT tester revealed that no picking occurred on coated paper contrary to the control that could be critical for print quality and linting problem on the press rolls. J. Color Sci. Tech. 7(2014), 265-274©. Institute for Color Science and Technology.