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Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [ 2 ] and range from small inexpensive consumer models to expensive professional machines.
In printing and graphic arts, mixing of two dissimilar colors in two adjacent printed dots before they dry and absorb in substrate is referred to as color bleeding. [1] Unless it is done for effect, color bleeding reduces print quality. Prior art applied this term to the phenomenon of single color ink following the fibers of the paper. [2]
Inkjet printers also suffer from 'dye wastage' as the ink cartridges are prone to drying up with low usage (without 'heavy use', the cartridge nozzles can become clogged with dried ink). Dye-sublimation media packs, which include both ribbon and paper, are rated for an exact number of prints which yields a fixed cost per print.
Paper is one amongst several key elements determining the quality of the print; the others are the ink, the printer, the printer/paper profile, the software used for print preparation and the skill and expertise of the print-maker. Photo paper is typically divided into glossy, "matte", semi-matte, semi-gloss, satin or silk, and matte finishes ...
In printing, anti-set-off spray powder is used to make an air gap between printed sheets of paper. This enables the ink to dry naturally and therefore avoid the unwanted transfer of ink from one printed sheet to another. The problem can occur with most types of printing.
Ink requirement is defined as the amount of ink needed to print a unit area with a standard Solid Ink Density. For newsprint, the ISO 12647-3 specification is C 0.90, M 0.90, Y 0.90 and K 1.10, Status E, D50, 2o, density minus paper with polarization filter. Ink requirement is measured as g/m2 (grams of ink required to print 1 m2 of paper)
As a result, an ink droplet is forced out of the cartridge nozzle onto the paper. This process takes a fraction of a millisecond. [4] The printing depends on the smooth flow of ink, which can be hindered if the ink begins to dry at the print head, as can happen when an ink level becomes low.
This subset of web offset printing uses inks which dry by evaporation in a dryer typically positioned just after the printing units; it is typically done on coated papers, where the ink stays largely on the surface, and gives a glossy high contrast print image after the drying. As the paper leaves the dryer too hot for the folding and cutting ...
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