Printing service is used by most businesses for varied reasons such as marketing and intra-company communications. Offset printing is the most commonly used printing technique and knowing about it is therefore helpful and essential.
Offset printing can generate a large number of prints quickly, which makes it less costlier than other technologies and also more well known. The clients giving bulk printing orders are recommended by the printers to choose offset printing due to this reason.
The ink used during offset printing has oil as the medium and is insoluble in water. The offset printing gets its name from the fact that the designs are transmitted indirectly from the plates to the paper by use of rubber blankets as the agents.
First step is to prepare the graphics. When offset printing started, the images had to be developed by the use of film negatives and they were later put on aluminum plates. In the present times, the printers can make use of the image setting system for making the plates directly. After this, the plate is stuck to a cylinder with the right side facing upwards. Then the water and ink are dispersed on the image plates, one after another. The ink is spread over the image and to stop it from spilling, a thin layer of water is spread over the remaining part of the plate.
The image is then transferred from the plates to the rubber blanket spun on another cylinder, so that it is inverted. The image is turned around to its correct side by transferring the image to sheets that have been cut according to the need and are placed on a different cylinder.
Printed sheets are stapled, glued, or arranged in any other way as required and the printing company delivers them after giving some finishing touches.
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