The Idea Behind Offset Printing

Most organizations require a printing service on a regular basis, whether it is for promotional purposes or intra-company communication. Hence it is helpful to learn about the basic working of the commonly used printing process called offset printing.

Offset printing can produce a large number of prints quickly, which makes it less costlier than other techniques and also more well known. The clients giving big printing orders are recommended by the printers to opt for offset printing because of this reason.

Offset printing uses oil based ink, which does not blend with water. In offset printing, rubber blankets play a transitional role in copying the image on the paper, which is to begin with on the plate.

The process begins by developing the designs. Film negatives were used in the past for making images and then copying them to aluminum based printing plates. This is no longer required as the technology is available for making the plates in one go through an image setting system. This plate is then placed on a cylinder in the proper configuration. Water and ink, in that order, is spread on the image plates. The ink is poured over the image and to stop it from overflowing, a thin layer of water is spread over the remaining part of the plate.

Next, the image is turned around when it is put on to a rubber blanket which is attached to another cylinder. The image is turned around to its right side by transmitting the image to sheets which have been cut in line with the need and are put on a different cylinder.

The work 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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