What is offset printing?

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βˆ™ 2011-09-07 11:29:47

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Offset printing replaced expensive and labor intensive raised metal type in the printing process with a photographic based system that uses a flat rubber mat to transfer an image onto paper. It was the predominant system for commercial printing from about 1960 into the beginning of the 21st century. It is currently losing ground to digital computer based systems that rely on colored toners to create an image. Offset printing works because of hydrophobia, oil and water don't mix. A photographic image in created on a flat metal printing plate that has a grainy surface that holds liquids well. The 'image area' on that plate has a coating that is receptive to oil-based printing inks while the uncoated areas tend to accept water and repel ink. Roller systems on an offset press supply measured amounts of ink and water to that plate allowing an image to form on it's flat surface. Other rollers transfer the image from the metal plate to a cylinder covered with a flat rubber mat called a 'blanket.' Finally, paper is delivered past the blanket cylinder and squeezed slightly against it by a third 'impression' cylinder. The ink transfers from the blanket to the paper and you have printed! In offset printing, the colors and appearance of the objects on all the printed materials are the same. For example, not one color is lighter or darker compared to the other copy. So this means that the finish printed products are consistent.

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Q: What is offset printing?
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Related questions

What is offset printing blanket?

Offset printing or web offset printing is a commonly used printing technique in which the inked image is transferred, offset. This is done from a plate to a rubber blanket, then to the printing surface.

Who invented offset printing and when?

Offset printing was invented in 1875 by Robert Barclay, but his invention was for printing on tin, not paper. Offset lithography for printing on paper was invented by Ira Washington Rubel in 1901.

What is Impact factor of web offset printing machines?

Web offset printing machine is high-speed printing machine.

What is offeset printing?

"Offset printing is a commonly used printing technique where the inked image is transferred (or "offset") from a plate to a rubber blanket, then to the printing surface."

Maintenance of an offset printing machine?


What are the defects of an offset printing?

newpaper defect

What is transferring drum in offset printing?

the transfer of a beat in one drum is formed by wood cutting (technology) and it contained with offset which can obform printing

Which printing process can be categorised as Digital Printing?

Generally when people talk about 'digital printing' it is in opposition of 'offset printing'. This can be confusing since they both begin with a digital source. Offset printing is the kind of printing that newspapers and magazines use where the print is separated into usually 4 different color plates (hence the word 'offset') whereas 'digital printing' relies on a digital file being sent to a RIP (it processes the file for the printer) then the RIP tells the printer how to squirt the ink onto the paper. No separations are needed for digital prints. The trend in printing is moving away from offset altogether, however offset's strengths have always been incredible speed (of printing) and cost effectiveness. As digital printing advances these differences diminish. HP even has a 'digital offset' printer that works like a modern digital printer, but with the capacity and speed to rival an offset printer.

What is the difference between offset and digital printing methods?

Offset printing is an indirect image transfer. This is common for putting a picture on cakes. Digital printing uses files and PDF's that are part of a software program. This is comon for printing pictures.

What websites offer aid with digital offset printing?

Digital Printing COmpany offers aid with digital offset printing. If you are not happy with their tips, there are links to follow that will take you do sister sites that may be of further assistance to you.

What has the author Nelson Richards Eldred written?

Nelson Richards Eldred has written: 'What the printer should know about ink' -- subject(s): Printing, Printing ink, Printing-ink 'Solving offset ink problems' -- subject(s): Offset printing, Printing ink

How does offset lithography work?

Offset printing is where an inked image is presed to two surfaces before it is printed.

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