Offset Printing Process
Offset printing is a cheapest way to print multicolour designs on papers. Offset printing is more fast and better in quality compare to the other techniques of printing. It is a technique in which the image is transferred from a plate to a rubber blanket, then to the printing surface
Plates are commonly made of tin and zinc. Generally there are 4 colour process used for print a paper in the machine- 1. Cyan, 2. Magenta, 3. Yellow, 4. Black. These 4 plates are fixed on a roller of machine so that the image of plates can be transferred on rubber blanket and rubber blanket to paper.
Always remember that offset printing works 4 primary colour processes. These primary colours are – CYAN, Magenta Yellow and black. Often we see that ready to print files have RGB Images. RGB colour processes are used to see on monitor it can’t print on offset. So the first important thing is to convert RGB colour mode files into CMYK colour mode.
Can we print Pantone colour?
Pantone colours are not printed in cmyk techniques. It will print as special colour. Many Offset have 5 to 8 colour blankets. 4 blankets are used in primary process colour and rest for pantone or special colours.