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How Does Offset Printing Work

Many significant tasks in a business such as maintaining flow of information within the company and marketing the offerings of the company need printing service. Hence it is helpful to learn about the basic working of the frequently used printing process called offset printing.

Offset printing is so well known among printing service companies and clients because for large quantities, it turns out to be cheaper than alternative methods. The customers giving big printing orders are recommended by the printers to opt for offset printing due to this reason.

Offset printing employs oil based ink, which does not mix with water. The offset printing is so called because the designs are transferred indirectly from the plates to the paper by use of rubber blankets as the agents.

First step is to develop 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. In the current times, the printers can use the image setting system for preparing the plates directly. This plate is then placed on a cylinder in the proper configuration. Water and ink, in that order, is spread on the image plates. While the ink gets stuck to the image, the water gets attached to that part of the plate where there is no image so that the ink does not spill beyond the image.

Next, the image is inverted when it is put on to a rubber blanket which is attached to another cylinder. 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.

The task of printing is finished by the printing company by consolidating the printed sheets using staples or paste or in any other way as per the needs of the client.

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