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Hello list, hello Edmund,<br>
If the Gutenprint CMYK profile is applied in pdftoraster e.g.
GhostScript as target profile, the print spool format can still be
PDF DeviceRGB as it is today. <br>
<br>
GhostScript will take this data, uses its default sRGB-profile as
source profile and converts to the target CMYK-profile.<br>
Gutenprint gets optimized CMYK for the approbiate driver-setting.<br>
<br>
I don´t see any need to make RGB-profiles for Gutenprint for a color
manages print path.<br>
<br>
Best regards<br>
Jan-Peter<br>
<br>
Am 16.05.11 13:23, schrieb edmund ronald:
<blockquote
cite="mid:BANLkTinekk_1kwKYQsgihRBTw4QBYzZj5Q@mail.gmail.com"
type="cite"><br>
<br>
<div class="gmail_quote">On Mon, May 16, 2011 at 10:10 AM,
Jan-Peter Homann <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:homann@colormanagement.de">homann@colormanagement.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
Hello to all,<br>
<br>
Reading the discussion about print targets, i missed some
points:<br>
<br>
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><br>
</div>
<div>Edmund</div>
</div>
</blockquote>
<br>
<br>
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Jan-Peter Homann ------------ mobile +49 171 54 70 358
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