Offset/Lithography Printing is a widely used commercial printing technique that produces consistent and high quality printed materials. As a general rule, this technique is used for production runs of large quantities of the same content.
Each Ink Colour has its own Set of Rollers
It is important to note that each ink colour applied to the paper has its own set of rollers as described above. Hence, an offset press used for four colour process printing has four sets of rollers in succession, one for each of the four colours. Likewise, a two colour offset press will have two roller sets in succession.
The Paper Feed
Offset printing presses are often described by the method used for feeding paper into the press, namely sheet-fed or web-fed.
A sheet-fed offset press uses single sheets of paper that are fed into the press one after the other. Sheet-fed presses are used for many popular printed items such as brochures, flyers, letterhead and booklets. Depending on the project, the sheets used may be the same size as the finished printed piece or they might be larger sheets that are trimmed down to the finished size after being printed.
A web-fed offset press uses a long, continuous roll of paper that is fed into the press from a giant spool. The paper feeds into the press through a series of tension rollers which keep the paper taut. After printing, the paper is trimmed to the desired size. Web presses run faster than sheet-fed presses and are used for high volume printing such as newspapers, magazines, books and catalogues.
Let us know if you have any questions about offset printing. Also, keep TopCopy in mind for any upcoming printing projects you may have. We make the printing process easy for you.