8mm Forum: Warping

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Topic: Warping

Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted August 02, 2015 04:50 AM

I was just reading a post submitted by our good friend Vidar regarding a print he has that has warped.

Some good advice was given to him regarding tight winding and leaving the film tails out for a time.

Then it got me thinking of my own one and only warped print to date which is a spanish 200ft WDHM short.
On this it Simply appears the film has been subjected to too much heat exposure over the years as it is also badly faded.

But then I thought to myself,what does cause this warping effect on film as I really am not sure?

Is it more likely with Acetate prints than it is with Polyester?

Is it heat related as I was assuming it was?

[ August 02, 2015, 05:52 AM: Message edited by: Andrew Woodcock ]

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"C'mon Baggy..Get with the beat"

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Paul Suchy
Expert Film Handler

Posts: 199
From: Westchester, IL, USA
Registered: Jun 2003

posted August 02, 2015 07:19 AM

Heat, humidity, and just plain sitting around without being run for long periods of time. I try to give my prints regular exercise by running them and not allowing them to sit. I have never bathed a print in Filmrenew, but I have treated them with it, and if the warping isn't too extreme, they will relax enough to show. I don't know much about which stocks suffer most, but I do know my IB Tech 16mm tends to warp which is not surprising since the stuff is at least 45 years old. I do store most prints tails out because if the film was in one position for a long while, it's a good idea to change it up a bit. I hear metal reels encourage warping and vinegar syndrome, so I try to use plastic reels. I bought a print that came on a slightly rusted reel, and the color and definition seemed to have been leeched out of the print and it looks like one of those early Xerox copies or a bad fax (extremely pale, like the window signs that are all faded out from constant sun exposure). Back winding is a good start, and a touch of film cleaner.

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Paul Suchy

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted August 02, 2015 07:49 AM

Thanks Paul for your in depth explanation and sharing your knowledge here with us all, most appreciated. [Smile]

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"C'mon Baggy..Get with the beat"

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Mark Silvester
Master Film Handler

Posts: 282
From: England
Registered: Oct 2007

posted August 02, 2015 07:56 AM

Hi all

I too noticed that back in the day when I collected 16mm quite a few IB tech prints had a bit of warp. Also used to notice a bit of the "slack".."baggy" take up. Not with all but with some.

Mark

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Mark Silvester

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Paul Suchy
Expert Film Handler

Posts: 199
From: Westchester, IL, USA
Registered: Jun 2003

posted August 02, 2015 08:57 AM

Thanks for your kind words, Andrew. I don't have much technical knowledge to share, but I can share what I've experienced. You're right about the issues with IB Tech, but when all is well, Technicolor can be glorious.

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Paul Suchy

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted August 02, 2015 11:01 AM

Some wqrped film often takes up with an egg shape.
This can be avoided by twisting the film before securing to the spool.

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Maurice

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Brian Fretwell
Phenomenal Film Handler

Posts: 1785
From: London, UK
Registered: Jun 2014

posted August 02, 2015 11:57 AM

The only film I have seen warped t home was one that I striped myself using laminate stripe and adhesive. Running too slow and with too much adhesive caused the warping. It was acetate, of course, standard 8.

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