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An acronym for “Commission Internationale de l'Eclairage Lab,” with "L" representing lightness, "a" representing the re/green axis, and "b" representing the blue/yellow axis. Cielab is the worldwide standard for color measurement and allows for easy communication concerning colors because it is based on numerical values, which takes the guess work out of color correction. Cielab models are used for verifying whether the colors of an image fall within the color range of the print process and the piece of equipment that will be used to output the image. Cielab is also used to check the color-carrying capabilities of various papers, which is beneficial for clients in determining the types of papers that are best suited for their application. As most printers are aware, coated stock is capable of displaying a wider color gamut than uncoated paper, so using Cielab to illustrate the color gamut of various papers can justify the use of a more costly stock to achieve better results.
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