- Offset Printing: – In the world of printing, one method stands out as the industry standard for high quality, professionally results – offset printing. Whether you're a business owner looking to advertise their products or a graphic designer working on a client project, understanding the ins and outs of offset printing can greatly improve your printing experience.
- What is offset printing?
- Offset printing, also known as lithography, is a printing technique that involves transferring ink from a metal plate onto a rubber blanket and then onto the printing surface. Unlike other printing methods such as digital or flexography, offset printing uses the principle of oil and water repelling each other to create a sharp, clean image on paper.
- The offset printing process:
- 1. Pre-printing: Before the actual printing begins, a thorough preparation process takes place. This includes designing the artwork, creating negative films or plates, and setting up the printing press.
- 2. Plate making: In offset printing, plates are vital as they carry the image to be printed. First, the artwork is transferred to a metal plate using light-sensitive chemicals. This plate is then placed in the printing machine.
- 3. Ink and water balance: Offset printing relies on a delicate balance between ink and water. Non-image areas on the plate attract water, while image areas attract ink. This balance ensures clean transfer of the image to the printing surface.
- 4. Print: As the printing engine starts, the platen comes into contact with a rubber cover. The image is transferred from the plate to the blanket, which then transfers it to the paper. This indirect method allows for consistent, high-quality prints.
- 5. Finishing: After printing is completed, the paper goes through various finishing processes such as cutting, folding, binding or coating depending on the desired end product.
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