<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On May 16, 2011, at 4:23 AM, edmund ronald wrote:</div><blockquote type="cite"><br><br><div class="gmail_quote">On Mon, May 16, 2011 at 10:10 AM, Jan-Peter Homann <span dir="ltr"><<a href="mailto:homann@colormanagement.de">homann@colormanagement.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto; ">
Hello to all,<br>
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Reading the discussion about print targets, i missed some points:<br>
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1) CMYK Colorspace for profiling Gutenprint:<br>
I strongly recommend to profile CMYK+X printers only with CMYK (+X) targets. Dealing with the relation of CMY to K is much better handled inside the printer ICC profile, than with a internal Gutenprint RGB_to_CMYK conversion and an RGB-printer-profile on the top.<br>
<br></blockquote><div><br></div><div>This is an interesting remark. At the moment, we have working presets for some printers, and an internal working though not perfect RGB => CMYK conversions for Gutenprint; Historically RGB was sent better through CUPS. I suggest that we start with an RGB print path. Note also that Linux apps are not very good at separating to CMYK by a profile usually :) so for prototyping I think RGB is really the only choice, not because it is better or even as good, but just because we can. </div></div></blockquote><br></div><div>FWIW, all of the DeviceRGB issues on Mac OS X do not exist for DeviceCMYK. However, most vendor drivers do not support DeviceCMYK (!) forcing you to do a DeviceRGB profile...</div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>________________________________________________________________________<br>Michael Sweet, Senior Printing System Engineer, PWG Chair<br></div></span>
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