An on-machine calender is located prior to the reel on our paper machine. An off-machine, sheet fed supercalender is also available to observe gloss development of coated papers. Printing Printing is an old process dating back to 1500 BC by the Greeks and used by the Chinese and Koreans before that. Modern printing was introduced in 1450 AD by Johann Gutenberg. All printing processes uses an inked printing image carrier to produce numerous reproductions on paper.
Paper is very difficult to change ater it has reached the printer.
Therefore, testing of the paper is important to both the papermaker and the printer. A KRK Universal Printability Tester allows for the testing of the pick, gloss and mottle. An IGT Printability Tester is also available. This is an official publication of the University of Maine.