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Standards Development
This standard defines a data set of ink value combinations that may be used to characterize four-color process printing. This data set is not optimized for any printing process or application area but is robust enough for all general applications. The needs of publication, commercial, and package printing with offset lithography, gravure, flexography, and other printing processes have been considered. While it is primarily aimed at process color printing with CMYK inks, it may also be used with any combination of three chromatic inks and a dark ink.
It is seen as an alternate to the IT8.7/4 data set where more neutral scale data is desired.
This takes the widely used data set defined in 12642-2 and extends this with additional grey patches while keeping the patch count the same by eliminating the duplicate patches that were in the original data set. This provides for several advantages over the original data set: It provides the necessary patches to do near neutral calibration without having to run a separate target in a press run. In addition, testing has shown that it often provides a better resultant ICC profile when the data includes the extended grey patches. By retaining the existing patch set and the number of patches it allows for consistent backwards compatibility of data and measurement devices.
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