Offset printing

A lithographic printing process based on the different wetting characteristics of the printing and non-printing areas of the printing form. When printing, the lipophile or “oil-friendly” image areas absorb the oil-like printing ink and the blank hydrophile areas repel it. Offset printing works is an indirect printing procedure in that the printing form transfers the printing image onto a blanket cylinder, which in turn prints the paper or other material. There is a distinction between sheetfed offset and web (or rotary) offset printing. The former prints on paper sheets and the latter on a paper web.


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