RE: Problems with Atkinson profiles on an Epson 9600
RE: Problems with Atkinson profiles on an Epson 9600
- Subject: RE: Problems with Atkinson profiles on an Epson 9600
- From: Tim Vitale <email@hidden>
- Date: Fri, 09 Sep 2011 11:33:46 -0700
- Importance: Normal
Thanks Scott.
The problem is the 9600 was the last Epson Pro without internal
linearization The Atkinson profiles were made with several iterations of
the profiling process to carefully define the shifts between inks, such as
light cyan to cyan, specific to pattern-of-dots used by the 9600's print
engine for the specific paper. When I talked to him I think (many years
ago) he said he profiled in many steps/iterations (maybe 8 times) each just
one RGB number (for each patch) higher.
I'm not sure how to preserve those valuable response curves created by
Atkinson, yet update the changes in the machine over time. My immediate
response was to convert [in PS, <Convert-t-Profile>] a small i1 target (RGB
1.5, 288-patch) to the respective Atkinson profile, and then, to profile
(or, re-profile) based on that [modified] target. Unfortunately, the result
was a much "darker and greener" image when using the protocol (convert the
image to the Atkinson profile) with the second profile. I called it a
"helper" profile. So, that didn't work, or I did it wrong.
I guess I just have to bite the bullet and profile using Atkinson's
4096-patch i1 target to make a new profile.
When I use ColorThink to look at the Neutral Rendering Curves (using Profile
Inspector, Curves tab) for the Atkinson and Epson-supplied profiles, they
look different. There are definitely more bumps in the upper part of the
red and blue lines.
Do you have any suggestions?
I'll be using PM4.1 with a 4096-patch i1 target (made by Atkinson) and an
i1Pro with the hand-powered scan table that came with it.
Tim Vitale
Paper and Photographs Conservator
Oakland, CA
510-594-82877
-----Original Message-----
From: Scott Martin [mailto:email@hidden]
Hey Tim. Your situation is common. These printers do change over time -
especially after heavy usage. All you need to do is make a fresh set of
custom profiles. If made well you'll see better results than ever.
Scott Martin
www.on-sight.com
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