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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.
Digital printing has a higher cost per page than more traditional offset printing methods, but this price is usually offset by avoiding the cost of all the technical steps required to make printing plates. It also allows for on-demand printing, short turnaround time, and even a modification of the image (variable data) used for each impression. [2]
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. The term in offset printing also refers to the unwanted transfer of ink to rollers and friction points throughout the printing press. Ink that is not properly ...
Variable Data Printing starts with a static piece of artwork and has an element that changes which can be fed from a database, such as a customer's name. Conventional offset printing uses 4 printing plates for CMYK color publications making it only cost effective to print thousands of copies of each version. Digital printing is also cost ...
Print on demand with digital technology is a way to print items for a fixed cost per copy, regardless of the size of the order. While the unit price of each physical copy is greater than with offset printing, the average cost is lower for very small print jobs, because setup costs are much greater for offset printing.
Direct imaging (digital) offset presses are waterless, with no dampening system. Waterless offset inks have a higher tack and viscosity (thickness) and are stiffer than conventional offset inks. The temperature of the inks must be strictly controlled to maintain the correct viscosity, as the plate surface is designed to repel inks of a specific ...
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