A couple of comments on this thread. I think calibration is unnecessary for professional printers (at least in the Epson class) since the quality control and deviation of colors in the inks is so tight. I've done several cartridge changes on my Epson 3880 in the 18 months that I've had it and not noticed any color drift at all when printing out the same images. As was noted, most if not all professional profiling software solutions don't implement this feature. I've not tried it to see what the effects are since my profiles appear fine without it. I shall take a look at it. I am running a Win7 machine and have not noticed any of the big color shifts that Wim has seen with his computer and Canon printer. It is possible that the issue is with the Canon driver in some manner. Finally, many of us print directly from Lightroom since it is easier and one can set up presets to avoid any "wrong" settings in the printing pathway. Since Lightroom does not permit softproofing, the implementation of the Photoshop curves method using the calibration file would not work unless one made a round trip to Photoshop. For some papers that are very well behaved (Ilford Gold Fiber Silk) I find that I don't need to do a lot of softproofing provided there are not a lot of out of gamut colors. Alan -----Original Message----- From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Phil Cruse Sent: Thursday, October 20, 2011 6:32 AM To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Re: Create RGB printer .ICM to use in Photoshop CS5 Hi, If changing brands then you should definitely reprofile! Changing empty cartridges, re-cal only if necessary, if cal works for you. Cheers Phil