Re: Printer - RBB or CMYK?
Re: Printer - RBB or CMYK?
- Subject: Re: Printer - RBB or CMYK?
- From: Wire ~ via colorsync-users <email@hidden>
- Date: Fri, 10 Jan 2020 01:21:23 -0800
Hi PPS Lists, I thought I should respond as the resident expert responded
by telling you to do RGB, when your question was about CMYK.
The approach you outlined sounds right in principle: create a CMYK image
with some overlapping swatches in CMY and K. If the printer processes it as
CMYK you will be able to see a difference in the amount of toner / ink
deposited in the swatches depending on the mix. As long the the driver
doesn't transform the image.
Printing CMYK requires Postscript which means the both the printer and
installed driver must support it. If the driver is PCL, it's RGB only.
I would expect a CMYK image sent to an RGB printer would produce an error,
or just produce a blank area for the image, but not sure.
If the printer is Postscript, it can take either or both forms of data
at once. You may need to select print dialog options pertaining to color to
ensure the data are not massaged. In some devices, it learns what to do
from selected ICC profiles. There is lore that says if you create a PDF
this can make getting CMYK data to the printer easier.
This discussion considers some gotchas from an Adobe perspective.
https://community.adobe.com/t5/acrobat/printer-color-management-is-not-passing-cmyk-data-to-printer-correctly/td-p/9535228
Save CMYK as PDF from Illustrator
https://graphicdesign.stackexchange.com/questions/81048/how-to-save-as-adobe-pdf-with-cmyk-color-format-in-illustrator
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