The documentation notes that you cannot do B/W profiles using Argyll and I posed the question some months back about the changing this but Graeme indicated that there are no plans to do so. If you have an Epson printer with the ABW driver for doing B/W you can prepare profiles using Roy Harrington's QTR program. Be aware that this will only work for the Windows OS since new MacOS versions and the Epson drivers do not permit B/W printing with profiles using the ABW driver. They require you to let the printer manage the workflow which is problematic in that the gray scale is not perfectly linear. You can use Argyll to read either a 21 or 51 step gray scale for conversion by QTR into a profile. Alan From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Jose Pereira Sent: Wednesday, December 14, 2011 11:08 AM To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Black&White Profiling Printing Hello: I'm trying to do a workflow for black and white printing. I am using the "print grey" option of targen: targen -v -d0 -f90 BW-Profile printtarg -v -iCM -a1.0 -pA4 BW-Profile colprof -v BW-Profile But when I enter in colprof, I get the error: "Error - Output device input file has unhandled color representation 'K_XYZ'" I have read a previous answer about a similar problem: "As noted in the documentation, Argyll doesn't currently handle more than CMYK profiles. Graeme Gill." OK! but, it is possible to do monochrome printing profiles? what is the right way to create a print test chart for Black and White profiling ? Thanks Jose Pereira