Basic Information You Should Know About Offset Printing
Printing service is used by most businesses for different functions such as marketing and intra-company communications. Hence, it is good to have some basic knowledge of how printing works, particularly offset printing, which is one of the most widely employed printing techniques.
Offset printing can generate a large number of prints quickly, which makes it more economical than other technologies and also more popular. The clients giving bulk printing orders are advised by the printers to choose offset printing because of this reason.
The ink employed during offset printing has oil as the medium and does not dissolve in 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.
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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 transferred to aluminum plates. This is no longer needed as the technology is available for making the plates in one step through an image setting system. The next step is to attach the plate on to a cylinder such that it is spot on. Water and ink, in that order, is spread on the image plates. The ink is poured over the image and to restrict it from overflowing, a thin layer of water is spread over the remaining part of the plate.
The image is then taken from the plates to the rubber blanket rolled on another cylinder, so that it is inverted. Afterwards, sheets of paper of required proportions are put together and the rubber blankets transfer the image to the sheets on a third cylinder, where it comes out as the correct side.
The work of printing is completed by the printing company by providing the final touches to the printed sheets using staples or glue or in any other way as per the needs of the client.
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