gamut volume and dot update issues
gamut volume and dot update issues
- Subject: gamut volume and dot update issues
- From: david wollmann <email@hidden>
- Date: Mon, 19 Jun 2006 18:19:09 -0600
This last weekend I was working on a new profile for my Epson 9800.
My first profile was made a couple of months ago using the output
setting for 1440 and the number of patches printed was 729, I'm using
Monaco Profiler. The new profile was made for a print setting of 2880
and I also used 1729 patches this time.
Much to my surprise the gamut volume was now a much smaller 374,026
vs 449,676 for the older profile as reported by ColorThink. The paper
I'm printing on is Hahnemühle Photo Rag.
Today I also learned, thanks to this list, of the printing issues
with MacOS 10.4.6 and Photoshop 9.0.1. My first profile was built
before these updates were installed but this last profile was built
using MacOS 10.4.5 and Photoshop 9.0.1. I am seeing banding in the
hue rainbow or Granger Rainbow with 9.0.1 but the rainbow is smooth
when output from Photoshop 8.
Would I be correct in surmising that this smaller gamut volume is a
result of the printing problems associated with 10.4.x and Photoshop
CS2 with the dot upgrade? It sounds like Colorsync is doing a color
conversion where it should not based on what I'm reading in the Adobe
forum.
There should not be such a large difference in the gamut volume
between 1440 and 2880, right? I was expecting the gamut volume to be
very similar?
Thank you,
David Wollmann _______________________________________________
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