offset press


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offset press

[′ȯf‚set ‚pres]
(graphic arts)
A printing press for offset lithography printing.

offset press

A printer that uses an intermediate rubber-coated cylinder known as a "blanket" to transfer the image onto the paper. Instead of transferring the image from a metallic drum onto paper as is done with most digital printers, the image is "offset" onto the blanket and then to paper. The blanket creates a smoother image on most types of paper and can print on rough or heavy stock as well as other media. Most offset presses use this lithographic method.

Sheet Fed and Web Fed
Sheet-fed offset printers use cut sheets of paper, whereas web-fed printers use rolls of paper that are cut and trimmed after printing. The web-based offset method is typically used for high-speed, high-volume applications such as printing newspapers and magazines.

Right Reading to Wrong Reading
Since offset presses use the intermediate blanket as the transfer mechanism, the original negative image on the drum is right-reading. It becomes wrong-reading on the blanket and then back to the original on the paper.

Combination Offset and Laser
Indigo USA, Woburn, MA (www.indigonet.com), which was acquired by HP in 2002, combines laser printing and offset printing. It makes a "digital offset color press," which is an electrophotographic printer that offsets to a blanket instead of imaging directly from the drum. It also uses a special liquid toner instead of dry toner, enabling it to print on polyester, PVC, films and other media as well as coated and uncoated paper. See lithography, digital printing, right-reading and DI press.


Offset and Digital, Too
HP Indigo's "digital offset color presses" are digital printers that use a blanket to image the pages instead of directly from the drum. Combined with its Electroink dry toner, Indigo printers can print on a wide variety of substrates. (Image courtesy of Hewlett-Packard Company.)
References in periodicals archive ?
Another feature that the offset press offers optionally is the MPS Ultraflex rail system.
Graham Trevett, vice president of sales for Goss International in North America, says packaging printers have expressed interest in this new Goss variable sleeve web offset press option due to the proven print quality, speed and low-waste efficiency.
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Harris Graphics introduced the Mercury single-width offset press, designed to replace the 30-year-old V-15.
Contract notice: Acquisition of an offset press ~ professional 4-color inline type .
In addition to its offset press manufacturing, Muller Martini produces finishing systems for commercial and book printers, trade binderies and newspapers, as well as short-run and digital book manufacturers.
Contract notice: Acquisition and maintenance of an offset printing 4 color reconstructed of a recovery offset press heidelberg sm74 and maintenance of an offset press sm 52-1.
The sleeve based combination offset press will be used for production of health and beauty labels.
Tenders are invited for Offset Press and Bindery Supplies.