What is involved in the offset process?

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Offset printing process is one of the oldest printing methods and one of the most commonly used in the commercial sector. Unlike inkjet printing and laser printing, which begin with the use of digital signals and their printing, the offset process begins to create metal plates in which the image is printed. The plates are then placed on the printer cylinders and properly aligned. The rubber belt is used as an ink medium, which is then applied to paper. After cutting the paper, the offset process is completed. The plates themselves are engraved in printed image and ink are added to the boards during the print process. The plates have traditionally been made by hand, but it is difficult and can significantly prevent the printing process, so most of the boards at the beginning of the 21st century are produced digitally using grating techniques to easily imitate the image to be printed.

After the plates are completed, they are placed in printers cylindersny. There are several cylinders for different parts of the Offset process and the boards must be placed in the correct order. If not, colors and printing errors may occur; For example, attempts to create double -sided printing can result in two different documents from two separate printing tasks printed on the opposite sides of the same sheet of paper. The location of the pads will vary depending on the exact offset method used and the number of cylinders.

At this point, the offset printer is turned on and the rubber belt comes to lift the ink from the boards. To be ink, to start, water and ink are combined, so ink purely imprint on the rubber belt. The image in the rubber belt is backwards. After printing, the rubber belt is usually cleaned and re -used in other Designs.

Ink from the rubber belt is transferred to paper; The rubber belt is reversed before reaching the paper, so the image is transmitted in the correct orientation. Most offset printers have large roles of paper, so the offset process so faris not completed. The cutting mechanism must properly reduce the outset paper roll to form the sheets correctly. If the offset printer uses the leaves instead of the role-what is unusual but not rare-, then there is usually no need for cutter or cutting is a function with low priority.