The science of offset printing plates

The principal operational functioning of all offset presses is the same, whether single colour or multi-colour, sheetfed or web-fed, domestically manufactured or imported. The presses make one impression with each rotation of the cylinders. All offset presses have three printing cylinders (plate, blanket and impression), besides inking and dampening systems. As the plate cylinder rotates, the plate comes in contact with the dampening rollers first and then the inking rollers. The dampeners wet t

by Som Nath Sapru