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Usually when printing a dark color the printer will saturate an area with colored ink dots, and conversely, for a light color it will use fewer ink dots. The resulting graininess is hard to notice with yellow because yellow is perceived as a very light color, but sparse individual cyan and magenta ink dots, e.g. for a pale blue sky, can be ...
When the two colors are process colors, the trap contains the highest value of each of the CMYK components. This trap color is always darker than the two abutting colors. In some cases, more specifically when the two colors are pastel-like colors, this might result in a trap that is perceived as too visible. In this case, reducing the amount of ...
Some printing presses are capable of printing with both four-color process inks and additional spot color inks at the same time. High-quality printed materials, such as marketing brochures and books, often include photographs requiring process-color printing, other graphic effects requiring spot colors (such as metallic inks), and finishes such ...
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] The amount of bleeding is affected by numerous factors, including the paper type, [3] paper's characteristics of ink absorption and its capillary action, [4] ink type and ...
When making a multi-color print with a spot color process, every spot color needs its own lithographic film. All the areas of the same spot color are printed using the same film, hence, using the same lithographic plate. The dot gain, hence the screen angle and line frequency, of a spot color vary according to its intended purpose.
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.