Message
Re: [colorvision_group] Extended Grays reducing Print Resolution
2007-10-24 by CDTobie@aol.com
In a message dated 10/23/07 7:33:09 PM, edknight@... writes:
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.
More info in profile data is equivalent to less smoothness. If you define the exact height of a road every foot along the way with a transit, you will get more literal flatness, but you may get less smoothness than if you just let the steamroller roll it all out, with reference measurements every 20 feet. Same with a profile. You are adding a LOT of gray data, so grays will be more literal. They will thus be less smooth in some cases. If you prefer the smoothness over the literal neutralness, then thats a case where you want to use a profile from a target with fewer patches. This is a universal issue with ICC profiles, not specific to ours. By the way, update to Spyder3Print software on our website, and you'll get a whole new set of test images to work with...
C. David Tobie
Product Technology Manager
Digital Color Solutions
Datacolor
CDTobie@...
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