KRK Blister Tester No.2295

In response to recent information-oriented society, a huge amount of coated paper for rotary offset printing is put into market. This type of paper may be prone to a specific trouble, that is, blistering in the printing and drying process. The blister tester simulates the state in the printing and drying process to examine the doubleface printing paper. It is useful for preventing blistering. Test is done by moving the coated paper printed on its double face in the heating furnace provided with fifteen far infrared heaters, changing moving speed and temperature. Sudden expansion of water in the paper causes blistering, which is visually observed.