Datacolor User to User Support Group.

For some reason the extended grays do that on some of my profiles with
specific papers only. What I do is go to the next stage (the large target on
3 pages and then add the extended grays. I actually pick up the problem in
the soft proof before I print, I have gone ahead and printed and the problem
is in the final print. But, like I said this is only on a few papers and
most of the time my profiles are better than the ones provided by the print
& paper manufacturers. In most cases the expert 225 patch target seems to
blend colors better than the large target.

 

From: colorvision_group@yahoogroups.com
[mailto:colorvision_group@yahoogroups.com] On Behalf Of edknight_w
Sent: Tuesday, October 23, 2007 1:01 PM
To: colorvision_group@yahoogroups.com
Subject: [colorvision_group] Extended Grays reducing Print Resolution

 

In the past week, I've profiled a few papers with the 225 patch target
and today started to add Extended Grays to the profiles. Since I'm
color-challenged, I read all targets twice and use the PFP Readings
Compare program in the files section to get each pair within a couple
of Delta-E. After tossing a couple of incompatible papers, I've no
real complaints, but a question.

When looking at bars to the left of the MacBeth ColorChecker Chart in
the color test image, I was surprised that two matte-surface papers
had better resolution using the profiles built without the use of
Extended Grays, Epson HW Matte and Epson Watercolor. If I didn't use
Extended Grays, these two had the best resolution of any non-luster
papers I've tried, but that advantage is gone if I include EGs in the
profiles. Confusing.

Printer: HP B9180 with OEM inks.

Any thoughts?

Thanks

Ed

 

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