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Under Color Addition
In four-color printing (or more), under color addition (UCA) is a technique for darkening areas of the printed image by adding colored inks. It is meant to achieve the same results as under color removal, but from a different starting position. Under color removal replaces colored inks in selected areas with black ink to achieve a darker appearance, whereas with under color addition, small portions of the three colors are added to these areas instead of, or in addition to, using black ink. UCA is used to reduce the speckle effects of dithering, especially with very light colors. Without UCA, a very light grey would consist of infrequent black specks that might be individually noticeable. With UCA, the specks are lighter and 3x more numerous. Printer drivers sometimes make the use of UCA somewhat configurable, disabling it when set to a mode intended to save ink. Graphic designers (or anyone else creating artwork for print output) are cautioned to be wary of using UCA. Used wrong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four-color Printing
The CMYK color model (also known as process color, or four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation ''CMYK'' refers to the four ink plates used: cyan, magenta, yellow, and key (black). The CMYK model works by partially or entirely masking colors on a lighter, usually white, background. The ink reduces the light that would otherwise be reflected. Such a model is called ''subtractive'' because inks "subtract" the colors red, green and blue from white light. White light minus red leaves cyan, white light minus green leaves magenta, and white light minus blue leaves yellow. In additive color models, such as RGB, white is the "additive" combination of all primary colored lights, black is the absence of light. In the CMYK model, it is the opposite: white is the natural color of the paper or other background, black results from a full combination of color ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Under Color Removal
In printing, under color removal (UCR) is a process of eliminating overlapping yellow, magenta, and cyan that would have added to a dark neutral (black) and replacing them with black ink only, called a ''Full Black'', during the color separation process. Under color removal is used in four-color (or more colors) printing. Black ink used to add details and darkness in shadowed areas is called a ''Skeletal Black''. With current ink technology, the total CMYK ink in the shadows refuses to stick after it reaches the dark shadows (usually above a 250% total CMYK coverage), and begins to peel off. To prevent this, printers developed UCR, in which neutral shadows – which would have normally been produced by overprinting the four inks ''Cyan, Magenta, Yellow and Black'' on top of each other (high ink coverage) – are replaced with the single layer of ''Black''. UCR removes the color inks ''under'' the Black, resulting in a single layer of ink which sticks to the sheet better, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rich Black
Rich may refer to: Common uses * Rich, an entity possessing wealth * Rich, an intense flavor, color, sound, texture, or feeling ** Rich (wine), a descriptor in wine tasting Places United States * Rich, Mississippi, an unincorporated community * Rich County, Utah * Rich Mountain (other) * Rich Township, Cook County, Illinois * Rich Township, Anderson County, Kansas * Rich Township, Lapeer County, Michigan Elsewhere * Er-Rich, Morocco, a town * Rich River, Victoria, Australia People * Rich (given name), often short for Richard * Rich (surname) Arts, entertainment, and media Fictional characters * DS Terry Rich, a character in the British soap opera ''EastEnders'' * Rich, a character in the American sitcom television series ''The Hogan Family'' * Rich Halke, a character in the TV sitcom '' Step by Step'' * Rich Hardbeck, a character in the British television series ''Skins'' * Richie Rich (comics), a fictional character Music * Rich, half of the American co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
