When printed via Adobe Acrobat (or printed directly from Adobe InDesign), a .pdf with #000000 (C: 30, M:30, Y:30, K:100) text is coming out with a blueish hue, while printed via Chrome gives an accurate rich black.
Forget about directly printing from InDesign in terms of high quality printed output.
From Acrobat or Reader, R=G=B=0 (RGB “black”) does by default print as CMYK=(0,0,0,1) if the proper option is set in the Advanced (Color Management) print options. This option is treat grays as K-only grays, which outputs R=G=B to CMYK=(0,0,0,1-(R=G=B)). This only works properly for PostScript printers.
Printing R=G=B to non-PostScript devices depends on the printer and its driver.
- Dov
- Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)
What do you mean by "#000000 (C: 30, M:30, Y:30, K:100) " - #0000000 is RGB black, and its conversion to CMYK will depend on the profiles used or assumed for RGB and CMYK. So what actual colour and profile is used?
The exact value for a neutral Rich Black is device and substrate dependent. Also I would strongly discourage rich black for text (Unless it is large bold heading type, but this also is dependent on substrate and process)
Forget about directly printing from InDesign in terms of high quality printed output.
From Acrobat or Reader, R=G=B=0 (RGB “black”) does by default print as CMYK=(0,0,0,1) if the proper option is set in the Advanced (Color Management) print options. This option is treat grays as K-only grays, which outputs R=G=B to CMYK=(0,0,0,1-(R=G=B)). This only works properly for PostScript printers.
Printing R=G=B to non-PostScript devices depends on the printer and its driver.
- Dov
- Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)
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