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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.
Waterless printing is an offset lithographic printing process that eliminates the use of water or the dampening system used in conventional printing. [1] Unlike traditional printing presses, waterless offset presses do not use a dampening solution to clear the press of ink. [2] Proponents of the technology claim efficiency and ecological ...
Lithography and offset lithography are planographic processes that rely on the property that water will not mix with oil. The image is created by applying a tusche (greasy substance) to a plate or stone. The term lithography comes from litho, for stone, and -graph to draw. Certain parts of the semi-absorbent surface being printed on can be made ...
[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.
In the offset lithography process, the mechanicals would be photographed with a stat camera to create a same-size film negative for each printing plate required. Paste up relied on phototypesetting, a process that would generate "cold type" on photographic paper that usually took the form of long columns of text.
An offset transfer moves the image to a printing substrate (typically paper), making the image right-reading again. Offset printing uses a lithographic process which is based on the repulsion of oil and water. The offset process employs a flat (planographic) image carrier (plate) which is mounted on a press cylinder.
For example it is often used to mask off areas of a design when using a photoresist to produce printing plates for offset lithography or gravure. It is also frequently used during screen-printing. Ulano also produced a yellow-(amber-)coloured masking film called Amberlith that was light-safe only for blue-sensitive emulsions. They discontinued ...
In printing, set-off is the term given to the unwanted transfer of ink from one printed sheet to another. 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.