Most companies require a printing service on a regular basis, whether it is for promotional purposes or intra-company communication. Therefore, it is important to have some basic knowledge of how printing works, especially offset printing, which is one of the most widely employed printing techniques.
The clients and the printers like offset printing because of its cost effectiveness for the production of large number of prints. The clients giving bulk printing orders are advised by the printers to choose offset printing due to this reason.
The ink employed during offset printing has oil as the medium and is insoluble in water. Its so called because in this process, images are not transferred directly from the plates to the paper but this is done using rubber blankets as a medium.
First step is to develop the graphics. Previously the images were produced by creating film negatives and were then transmitted to printing plates made of aluminum. In the present times, the printers can use the image setting system for preparing the plates directly. After this, the plate is attached to a cylinder with the correct side facing upwards. Then the water and ink are spread on the image plates, in that order. The ink is poured over the image and to restrict it from spilling, a thin layer of water is put 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 reversed. The image is then printed with its right side looking up by cutting sheets of papers into appropriate size and placing them on a third cylinder.
The final steps of the printing job involve things such as stapling, gluing or arranging the printed sheets in line with the instructions of the client, and any printing company should easily manage these.
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