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Offset printing is a common printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water , the offset technique employs a flat ( planographic ) image carrier.
The problem can occur with most types of printing, and is avoided by the use of slipsheets between copies (so any ink transfer occurs onto discardable paper) or anti-set-off spray powder. The term in offset printing also refers to the unwanted transfer of ink to rollers and friction points throughout the printing press. Ink that is not properly ...
Offset is a process similar to lithography, consisting of applying an ink on a metal plate, usually aluminum. It was the parallel product of two inventors: in 1875, the British Robert Barclay developed a version for printing on metals (tin) and, in 1903, the American Ira Washington Rubel adapted it for printing on paper. [3]
Letterpress printing was the normal form of printing text from its invention by Johannes Gutenberg in the mid-15th century and remained in wide use for books and other uses until the second half of the 20th century, when offset printing was developed. More recently, letterpress printing has seen a revival in an artisanal form.
Offset agreement, a trade practice in the aerospace and defense industry; Offset loan (finance), a type of flexible lending arrangement; Offset printing, a printing technique where an inked image is transferred from plate to printing surface via a rubber blanket; UTC offset, time difference at a certain place from Coordinated Universal Time
Waterless printing yields higher ink densities and a broader color spectrum than conventional offset printing does. Waterless plates used on sheet-fed presses are commonly rated for runs of 100,000 to 200,000 impressions. The plates designed for use on web-offset presses can yield 300,000 to 500,000 impressions.
[8] [9] Offset printing or "offset lithography" is an elaboration of lithography in which the ink is transferred from the plate to the paper indirectly by means of a rubber plate or cylinder, rather than by direct contact. This technique keeps the paper dry and allows fully automated high-speed operation.
Prepress is the term used in the printing and publishing industries for the processes and procedures that occur between the creation of a print layout and the final printing. The prepress process includes the preparation of artwork for press, media selection, proofing, quality control checks and the production of printing plates if required.