Message
Re: [colorvision_group] Profiling 9800 problems
2006-06-05 by CDTobie@aol.com
In a message dated 6/5/06 1:33:15 PM, dubois@... writes:
I have now completed the best possible target printout for the Museo
Max paper (after trying every possible combination. The final
settings were Enhanced Matte media settings, entering a 0.5 mm
thickness, and -10 Color Density.
Sounds like you've done your homework. Ideally this is the process that would be used for every profile, but its often possible to get good results without being so comprehensive... and if you don't get good even even with being so comprehensive, there may be a compatibility issue, or other problem.
The targets still are not spectacular.
Targets don't have anything to do with the color management process, other than feeding it optimal raw output. If the tagets are not spectacular, then the results won't be either, as they will be based on the gamut, shadow detail, and linearity of the raw target prints.
Comparing the resulting profile to the generic profile for Museo 9800
provided by Crane shows that the Crane generic profile has a 50%
wider gamut that the ColorVision one I just produced.
Comparing printed colors, or comparing gamuts in a gamut comparison utility? Gamut comparisons can be deceiving, as editing profiles can make them lie, cheat, and steal.
I am suspicious (as I have been for a little while) that the Epson
9800 may be the problem and we may have gotten a bad printer.
If it prints good color on Epson media, via Epson canned profiles, and the jet tests are fine, then its not likely to be the printer...
Or maybe since I don't know the first thing about profiling except
what I have crammed in the last few days, I am missing something
obvious.
The fact that supplied profiles can have deceptive gamut maps is one thing you may have missed...
We have tried every media setting and other setting change
possible printing out the media test image. We have also printed
numerous targets and compared.
Then I assume you have found a reasonably optimal raw setting for printing targets. That will show you right up front what gamut to expect. If you need redder reds, bluer blues, greener greens, etc... than the target prints show, then you are going to be dissapointed...
Head alignments and nozzle checks have been part of the proces.
1. Should there be such a differemce between the generic Museo
profile provided by Crane and the one I am making?
Dramatic difference where? Are we talking gamut viewer differences, or printed gamut differnces? To check the printed gamut, open the 225 patch single page target from the PFP Targets folder, assign your workingspace, to it, and print to the Crane profile. That will show you what max colors the Crane profile can manage. Do the same with the PFP profile, and check the primary patches in that. If Crane is getting colors beyond PFP's, then there is definately something amiss.
2. Trying to profile an Epson 10000 simultaneousy, we get targets
that have a better differentiation on the 10000 than on the 9800.
Does that indicate a problem with the 9800?
Possibly, but the 10000 is a dye printer (unless you have third party inks in it) and it will respond very differenty (and somewhat more broadly) than the pigments in the 9800.
C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com