During the development of analog proofing processes(e.g., Cromalin and Matchprint, see also sec. 3.1.6), colorantsfor powder toner or overlay color film materialswith primary-color locations that correspond to thoseof the standardized process inks under a given type ofstandardized illumination were sought. In addition,these colorants should also have the same reproductioncharacteristics (dot gain, etc.) as a conventional ink. Inthe absence of suitable colorants (e.g., pigments), in theend only substitute colorants which were as similar aspossible were found. Therefore, strictly speaking these
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