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Litho & Digital Printing
Lithographic Printing
Lithographic (Litho) printing is best suited to medium to large sized print runs of any sort of high volume materials such as brochures, maps and business cards to posters, office stationary, books and newsletters. In fact lithography is the printing method of choice for all high volume text printing industries.
Lithographic printing uses plastic plates that are rendered with a negative photographic image of the artwork/ text in question. The emulsion that the image is rendered in is oil-based. This plate is then affixed to a press where two sets of rollers apply water and ink to the plate. The image emulsion absorbs the ink and repels the water.
The plate is then applied to a rubber-surfaced blanket which then absorbs the ink and squeezes off the water. From the rubber blanket the image is transferred to the paper or material on which the printing is required.
Digital Printing
Modern printing methods such as laser and ink-jet printing are known as digital printing. In digital printing, an image is sent directly to the printer using digital files such as PDFs and those from graphics software such as Illustrator and InDesign. This eliminates the need for a printing plate, which is used in offset printing, which can save money and time.
Without the need to create a plate, digital printing has brought about fast turnaround times and printing on demand. Instead of having to print large, pre-determined runs, requests can be made for as little as one print. While offset printing still often results in slightly better quality prints, digital methods are being worked on at a fast rate to improve quality and lower costs.
The greatest difference between digital printing and traditional methods such as lithography, is that there is no need to replace printing plates in digital printing, whereas in analog printing the plates are repeatedly replaced.
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