Tom is correct. I posed the same question a couple of years ago and Graeme replied that you cannot generate a gray scale profile. You can generate a patch set and read it using Argyll and then plug the results into Roy Harrington’s QTR scripting program. That will generate a profile that you can use with Epson printers that have an ABW driver. I have used targen to generate both a 21 and 51 step B/W patch set for profile generation. One note if you go down this route, the profiles are only good if you are running a Windows OS. MacOS will not permit you to allow Photoshop/Lightroom to manage colors with the ABW driver. Alan From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Tomasz Danus Sent: Monday, December 01, 2014 7:14 AM To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Re: Grayscale ICC profile Hi Alexey I am using modified method from http://www.northlight-images.co.uk/article_pages/bw_printing/bw_print_colormunki.html Works perfect with Argyll and QTR. Cheers Tom -- t.danus@xxxxxxxxx <mailto:t.danus@xxxxxxxxx> Skype: Ithilstone On 1 December 2014 at 12:01, Andrzej Andrez <an2rez@xxxxxxxxx <mailto:an2rez@xxxxxxxxx> > wrote: Hi! Look here: http://www.argyllcms.com/doc/Limitations.html I think that argyllcms does not support gray scale (monochrome) profiles yet. Best regards, Andrzej 2014-12-01 12:46 GMT+01:00 Alexey Gribunin <Gribunin@xxxxxxx <mailto:Gribunin@xxxxxxx> >: Hello! Is there any possibility to create grayscale ICC profile with ArgyllCMS? I tried to create ti3 according to ti3 file generated by "targen -d0" and then fakeread from it but without success. I'm getting Error - Output device input file has unhandled color representation 'K_XYZ'. What's wrong am I doing? My ti3 file attached. Best regards, Alexey Gribunin.