As a rule, spot colors in your print job will be converted to CMYK data during conversion according to the CMYK substitution defined in your application.
When Automatic Pantone® Calibration is enabled, a conversion does not apply these substitutions but rather special tables that define how a spot color is to be printed on a specific paper type and with a specific print quality. The HP Designjet 50ps PrintManager automatically selects the table that matches the paper type and print quality selected and ensures a spot color representation that is ideally matched to the material. This method applies to the most commonly used Pantone® inks.
Note: This, however, requires that the spot colors were defined in the application and included as such in the print job.
It may happen that a spot color bearing the same name in the paper-specific spot color tables has been defined in Settings > Inks in the HP Designjet 50ps PrintManager. In this case, the conversion defined individually under Settings > Inks will be used.
See also How do I define spot colors?
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