A printing method that takes advantage of the fact that water and grease don't mix. The image is transferred using a greasy media, such as a particular greasy ink called tusche, crayon, pencils, lacquer, or synthetic materials, to a grainy surface (traditionally stone but more typically aluminium).
The inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface in offset printing, a typical printing technique. The offset method makes use of a flat image carrier when combined with the lithographic process, which is based on the attraction of oil and water.
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