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For color processes, an individual black and white, "screened" negative is used to represent each color in a four-colour process (Cyan, Magenta, Yellow and Black) to be printed on a printing press. A screened negative has varying sizes of dots arranged in a particular pattern to represent greater or lesser density of image.
Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen in a "flood stroke" to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.
The CMYK color model is based on the CMY color model, which omits the black ink. Four-color printing uses black ink in addition to subtractive primaries for several reasons: [2] In traditional preparation of color separations, a red keyline on the black line art marked the outline of solid or tint color areas. In some cases a black keyline was ...
In the "pre-press" stage, original images are translated into forms that can be used on a printing press, through "color separation" and "screening" or "halftoning". These steps make possible the creation of printing plates that can transfer color impressions to paper on printing presses based on the principles of lithography.
A printing press is a mechanical device for applying pressure to an inked surface resting upon a print medium (such as paper or cloth), thereby transferring the ink.It marked a dramatic improvement on earlier printing methods in which the cloth, paper, or other medium was brushed or rubbed repeatedly to achieve the transfer of ink and accelerated the process.
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 effective for an individual publication with a fast turnaround. Toner cartridges or Inkjet Cartridges are used making them easy to operate and maintain ...