Offset Printer

Offset printer run, manage, and maintain offset printing machines. These printing machines are used to print newspapers, magazines, catalogues, brochures and books etc. Offset printers fasten printing plates onto printing presses, place the paper or whatever the required material is in the printing press, prepare inks by mixing colours, and control other functions of the press such as flowing of ink cutting and folding mechanisms. Offset printers work in cities and towns around Western Australia

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Detailed Description for Offset Printer

But the thing is before getting to know what offset printers are, we must have knowledge about offset printing that what actually offset printing is?


What is offset printing?

It is a printing methodology in which ink is spread on a metal plate with etched images, then is transferred to an intermediary surface or coating like rubber blanket and finally applied to paper by pressing the paper against the aforementioned intermediary surface.



Offset printers work in a simple manner. It makes use of three cylinders to transfer the image onto the substrate. Initially, the first cylinder is mounted with the printing plate and image on the printing plate is ‘right-reading’ (with the right side up). The first cylinder is inked and the image transferred onto the second cylinder, is mounted with a rubber blanket. The image on the second cylinder is therefore reversed (or say, becomes ‘wrong’ reading). And finally the image is shifted from the blanket cylinder onto the third cylinder or the substrate. The substrate is then mounted on the third cylinder. The image once again is reversed and becomes ‘right’ reading or right side up in the final printed version. Third cylinder is also known as the impression cylinder.


Types of offset presses:

Offset printers are primarily of two types:

1.       Sheet-fed offset printing press: In this kind, the printing is carried out on a single sheet of paper as they are fed to the press one at a time.

2.       Web-fed offset printing press: This is a kind of web offset printing in which the printing is carried out on a single, continuous sheet of paper from a large roll. The sheet is further divided into the desired sizes.


Applications of offset printing:

“Over 40% of all print jobs are carried out using offset printers”.

Below are the some examples of the applications of offset press.

·         Probably newspapers are the most visible examples of printing offset.

·         Books are also a result of offset printing.

·         Large volumes of legal forms and documents are printed by making of this method only.

·         Even in the field of business, important financial data and sheets are in existence only due to this offset printing.


Advantages of offset printing:

As compared to the traditional digital printing, offset printers do have several advantages.

·         The ink which fades and runs out in digital marketing is actually controllable in here. The operator can twist some screw keys to operate the flow of ink onto the fountain roller.

·         Printing plates themselves are fast and easy to make using today’s technology.

·         Cost effective method.

·         Image quality is precisely good as the rubber blanket on the printing plate fits itself to the texture and tone of the printing surface leaving a clean and detailed image every time.



Drawbacks are fewer of these offset printing methods.

·         Printing plates are made up of anodized aluminium, making them vulnerable to chemical oxidation.

·         Needs extra maintenance.

·         Though the image quality is good, but not as good as a photogravure printing.

But when it comes to draw a conclusion, the whole advantage thing out-weighs the disadvantages, at least when it comes to high-volume printing jobs.

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