The most common type of lithographic printing is offset. This printing process is based on the fact that oil and water don't mix. In offset lithography, you have an oil-based ink roller and a cylinder covered in water. Your printing plate is moving through both and picking up the positive and negative parts of the image. The positive parts of the design will attract the ink while repelling the rest.
Next, the inked, positive parts of the design are transferred to the blanket cylinder. That’s what makes the process offset. The blanket transfers the image on your print surface while the impression cylinder pushes your substrate onto the print plate giving your image its crisp, beautiful design.
That is lithographic printing.
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