PGA 202
Off Set Printing
Chapter 10 : Preparing Machine for Printing a Single-Color Job
DAE Printing & Graphic Art Technology | Second Year
Short Questions
To prepare the dampening system for operation in offset printing, mix the fountain solution to the correct specifications and clean the system. Then, adjust the rollers, establish the water-to-ink balance, and perform trial runs to ensure quality.
In offset printing, the ink and water balance are achieved by using a dampening system to apply water to the non-image areas of the plate, preventing ink from adhering there. The right balance is essential for clear prints and is maintained by adjusting water levels, printing speed, and pressure.
A “pass” sheet in offset printing is a paper that has been printed on one or both sides in one pass through the press. It indicates the print run efficiency.