Study on Blistering Resistance of Coated Papers with a New Air Permeability Tester, 1996 Coating Conference Proceedings

The blister of coated paper that is caused by rising water vapor pressure, is a problem for web- offset printing. Therefore, predicting the blistering tendency of coated paper is very important for us. We have developed a new air permeability tester with which we can measure the acceleration of the air permeability of coated paper under high temperatures (~300°C) and high pressures (~4.00 kgf/cm 2 ) during a short time. These conditions are close to the real world in the drying process of web-offset printing press. With the new air permeability tester, the correlation between the acceleration of the air permeability and the blistering resistance of various coated papers was investigated. We found that the acceleration of the air permeability was more strongly related to the blistering tendency of coated papers, than conventional air permeability testers. So, the result indicates that the new air permeability tester is very useful in predicting the blistering tendency of coated paper.