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Author Topic: The truth about Vinegar Sydrome!
John Hermes
Expert Film Handler

Posts: 139
From: La Mesa, CA, USA
Registered: Nov 2008


 - posted January 04, 2010 09:08 PM      Profile for John Hermes     Send New Private Message       Edit/Delete Post 
I have seen lots of Kodak camera film, B&W and Kodachrome, with VS. Most of it is from the mid-1930s and 1940s, but once in a while even films from the 1950s have it. Once again, the stuff stored in the tight cans is most prone, from my experience.

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John Hermes

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Bill Brandenstein
Phenomenal Film Handler

Posts: 1632
From: California
Registered: Aug 2007


 - posted January 05, 2010 10:57 AM      Profile for Bill Brandenstein   Email Bill Brandenstein   Send New Private Message       Edit/Delete Post 
Yes, I would agree with you on that John (Brad too). Always in cans, and the same vintage.

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Bill Brandenstein
Phenomenal Film Handler

Posts: 1632
From: California
Registered: Aug 2007


 - posted January 07, 2010 10:20 AM      Profile for Bill Brandenstein   Email Bill Brandenstein   Send New Private Message       Edit/Delete Post 
Anyone want to respond to my suspicion that all Super 8 camera film is diacetate to this day?

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John Hermes
Expert Film Handler

Posts: 139
From: La Mesa, CA, USA
Registered: Nov 2008


 - posted January 07, 2010 01:00 PM      Profile for John Hermes     Send New Private Message       Edit/Delete Post 
Whenever I have seen the base of Kodachrome specified it has been triacetate propionate. According to this report, Kodak discontinued diacetate films around 1940.

http://louisville.edu/library/ekstrom/special/files/Acetates

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John Hermes

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John Whittle
Jedi Master Film Handler

Posts: 791
From: Northridge, CA USA
Registered: Jun 2003


 - posted January 07, 2010 01:29 PM      Profile for John Whittle   Email John Whittle       Edit/Delete Post 
I don't think Kodachrome was on diacetate, what I found was:

"Kodachrome Film is currently made on cellulose acetate propionate support."

I haven't been able for find any reference where this was changed and why that emulsion was made on that base may relate to the coatings or the coupler/color developers in processing. In any event, it would show as a difference in edge transmission. As I recall 7387 had a different edge look that 7381 (Eastman Reversal Color Print/Eastman Color) which was also different from Ektachrome Print and Ektachrome R Print (7386/7388).

The base material for 7386,7388 and 7381 were all identical so it must have been an observation based on some other factor. 7386 and 7388 didn't have the rem-jet backing but a silver colloidal (sp) anti-halation layer. 7381 and 7387 however did have a rem-jet backing (a carbon black back of film coating that was removed in the first stage of development).

There was a black light test for nitrate/safety film but that was because a chemical had been added to all the safety film materials to make that test possible.

John

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