The Working Of An Offset Printer
Most organizations need a printing service on a regular basis, whether it is for marketing purposes or for internal communication. Offset printing is the most commonly used printing technology and knowing about it is therefore helpful and essential.
The clients and the printers like offset printing due to its cost effectiveness for printing of large number of prints. The customers giving big printing orders are recommended by the printers to opt for offset printing because of this reason.
This printing technique uses oil-based ink, which is not soluble in water. Its name comes from the fact that in this process, images are not transported directly from the plates to the paper but this is done using rubber blankets as a medium.
First step is to prepare the graphics. When offset printing began, the images had to be made by the use of film negatives and they were later put on aluminum plates. But, a modern printing company would now prepare the plates directly by using an image setting system. The subsequent step is to transfer the plate on to a cylinder in the right manner. Next, the water is put on the image plates, which is followed by the ink. The image gets the ink while the rest of the area receives a thin coating of water, which makes sure that the ink does not spill outside the images.
The image is then transferred from the plates to the rubber blanket rolled on another cylinder, so that it is inverted. The image is now printed with its correct side looking up by cutting sheets of papers into correct size and placing them on a third cylinder.
Printed sheets are stapled, glued, or arranged in any other way as required and the printing company sends them after giving some finishing touches.
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