Message-Id: <mailto:199503250508.XAA29027@library.wustl.edu> Date: Fri, 24 Mar 1995 09:14:11 -0500 From: David Y Allen <mailto:DYALLEN@CCMAIL.SUNYSB.EDU> Subject: QUality control and Kodak Photo CDs To: Multiple recipients of list IMAGELIB
State University of New York at Stony Brook
Stony Brook, NY 11794-3331
David Y Allen
Library-Reference
516 632-7110
24-Mar-1995 09:12am EST
FROM: DYALLEN
TO: Remote Addressee ( mailto:_imagelib@listserv.arizona.edu )
Subject: QUality control and Kodak Photo CDs
The attached message is in response to my earlier posting on quality
control problems with Kodak Photo CDs.
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Date: Thu, 23 Mar 1995 08:18:58 -0500
From: mailto:osuch@kodak.com (Bill O'Such)
Subject: QUality control and Kodak Photo CDs
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Dave
I'm not a subscriber to this listserver, so could you post this response
for me ?
Re: Quality control and Kodak Photo CDs
As with optical printers, mass market transfers to Photo CDs will suffer
the same price/value tradeoff. In most cases you pay for what you get.
The labs charging more money per transfer are generally doing a better job
though there are some exceptions. Unfortunately, I can't advocate one lab
over another. You may want to post to mailto:photo-cd@info.kodak.com or within
Compuserve (GO KODAK). Several labs lurk there and will probably respond
directly to you.
We're in the midst of a training effort for all US labs to give them the
knowledge and verify the setup of their equipment. However, it will be up
to the labs to follow through on this effort. It is very difficult, both
legally and economically, for Kodak to "police" the industry.
For reversal film scans or properly exposed reversal films, the labs should
be using the Universal E-6 film term for E-6 processed film and the
Universal K-14 film term for K-14 processed with NO adjustments made unless
the customer requests it. We've had many "added value" situations where
the lab has done more harm than good. To verify if the right film term was
used, use either the Kodak Acquire Module of the KCMS plug-in and hit the
"Info" button. The product and gen code of the film term is given. For
E-6 films, this should read 052/55 while for K-14 films it should display
116/22. For reversal films with widely varying exposure errors, there are
associated "auto balance" terms that the lab should use.
Among the recommended procedures which help maintain good reversal film
scans are: regular cleaning of the scanner lens and proper cleaning of the
film.
Some quick items. If you're shooting negative film and place a 20% grey
card in the scene, the aim C1 and C2 values should be 156 and 137
respectively. Make sure your scene does not have any wide variations in
color, lightness, etc. that may fool the automatic algorithms. The best
way is to minimize those variations is to move the camera close to the grey
card and create a full frame exposure. Since the algorithms being run are
statistical in nature, don't expect perfect values each time but they
should be within a few code values. Also, at ftp.kodak.com, there is a list
of the product and generation codes for the various film terms. Using the
"info" tools mentioned earlier, you can verify that the right film term was
used.
I'm aware of no broad trade surveys. There have been small ones done in
various areas including the Rochester Institute of Technology.
Unfortunately, I have no direct access to electronic versions of that
information.
Hopefully, the upcoming training efforts improve all the lab's performance.
If you obtain any other information, please email it to me.
Have a nice day !
Bill O'Such
Eastman Kodak Company
Internet: mailto:osuch@kodak.com; Compuserve: 72662,27