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FLEXO Magazine : October 2012
3-PART FORMULA In daily operation the solution utilizes three basic concepts to manage color transformations: • Print Condition • Spot Color Library • Recipe Library (Where Print condition + Spot color library = Recipe library) Print condition: A print condition stores the measured color capabilities for a precisely described and repeatable press environment. A color characterization chart is printed under the exact press environment for a print condition. From measuring the chart with a connected spectrophotometer, the software stores the measurement data in a color model, which describes the expected press response to standard colors when a job is run under this print condition. Spot color library: A color library stores the CIE target values for a set of spot colors. The software includes a few factory color libraries to help get started, and users can add libraries as needed. You can import a set of spot colors and their CIE L*a*b* values, enter spot colors manually, or measure a sample with a spectrophotometer to add a spot color. Recipe library: A recipe library is generated based on the pairing of a print condition with a color library for which the user requires recipe builds. Each recipe in the recipe library contains ink tint values that specify the process color build for reproducing the corresponding spot color, under a specific print condition. When creating a recipe library, the user can choose to generate recipes that contain either a maximum of three, or a maximum of four, process colors in the generated recipes and also choose to include, or exclude, the black channel in the generated recipes. Expanding the color gamut—achievable with four process colors—means jobs can be printed with fewer colors, and often enables multiple designs to be printed on the same web, delivering greater flexibility and reduced setup times. As a result of greater use of a standard four-color set, users are driving significant internal efficiencies. At the same time, they are avoiding the prepress complexi- ties associated with Extended Color Gamut printing (printing with six or seven process colors), maximizing profitability and 28 FLEXO october 2012 www.flexography.org