Colour Laser icc profile using Argyll

[johna1954]

Hi Everyone. Just found your forum and look forward to a long relationship with you.
I use an entirely Linux workflow using GIMP and Darktable to produce images for printing and a Color Munki spectrophotometer.
My OKI C931 colour Laser printer does not have a facility in Linux to include ICC profiles but recently became aware that the Darktable print module can. I have previously tried creating a profile using Argyll but not entirely sure what are the best settings are for a Laser printer. The settings I used were:
targen -v -d4 -G -g90 -t -f240 "240_A3"
printtarg -v -iCM -a1.30  -h -b -t300 -P -M9 -pA3 -L "240_A3"

I have looked at several other examples/suggestions online but confused by a lot of the technical information. I would appreciate it if anyone can check and comment on the settings used (I will increase the number of patches once the other settings are correct)

Thanks in advance
John

[BradFunkhouser]

You probably want to post this question to the ArgyllCMS mailing list, which is the primary avenue for Argyll support:

http://www.argyllcms.com/mailinglist.html

For your targen command, I'm wondering if the device is actually an RGB device, which would be "-d2" rather than "-d4"

[johna1954]

Hi BradFunkhouser,  thank you for your reply.  There was a link on the Argyll website to this forum and looking at this website I was struck by the range of topics covered.
Re your comment. I am fairly sure the printer is CMYK but maybe need to try both.

[howardm]

they're pretty much all CMYK but their drivers WANT RGB and it'll do the conversion for you.  You want -d2

[GWGill]

they're pretty much all CMYK but their drivers WANT RGB and it'll do the conversion for you.  You want -d2

Depends on the print path. Via an appropriate PostScript RIP they will be CMYK. Via something like the MSWindows print driver, they will be "RGB".

[johna1954]

Thank you howardm and GWGill for your  replies.

I think that I will try both and see what happens. I had tried to install an RGB profile before in colord but it would not recognise it. Using a CMYK did install but there was no change in the quality of the prints.
This time I will be using Darktable's print plugin so should be able to see both profiles and compare.