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Author Topic: Print rising up in middle
Ed Forth
Film Handler

Posts: 11
From: Syracuse, NY, USA
Registered: Jul 2010


 - posted 11-27-2010 06:55 PM      Profile for Ed Forth   Author's Homepage   Email Ed Forth   Send New Private Message       Edit/Delete Post 
I did a couple of searches to see if there was a thread on this, but nothing came up and I'm not exactly sure what to search for.

I'm the manager of a subrun and we're currently showing The Town.

My assistant built up the print and when he did there were ridges at all of the reel changes. maybe 3-4 film thicknesses, raised up about a centimeter.

After running the film down, the print was smooth, but the ring had worked it's way out of the platter (it's a Potts platter) so that the print was just sitting on the platter with the center raised up the length of the ring posts and the film smoothly going down the the platter over the length of the print.

It's continued to do this everytime we've played the movie, so I've started going up and pushing the ring back in about 40ish minutes into the film, after which it winds up as normal for the rest of the show.

I've never had this happen before, although I've only been projecting for 3-4 years, so there's plenty outside my experience.

Any ideas what's causing it? How I can stop it?

In case it's helpful, here is the information on the side of the platter system:

Robert L Potts, ENT (Urbana, ILL)
Model: 35-5
Serial Number: 5147
120 Volts 9 Amps Max

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007


 - posted 11-27-2010 07:05 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
It has happened, but I've never figured it out. Static?
Some prints used to raise 1/2" for just a few layers before going back to normality.

I guess it's a print defect since I remember those prints were having this behaviour in the same place all the time.

Try rewinding the print with the emulsion facing the opposite side you normally do then, eventually, go back to the usual way. Just a guess.

I tried some filmguard on top of the platter reel (didn't have the Kelmar) but it didn't work.

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Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99


 - posted 11-27-2010 07:06 PM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Sounds like the print itself has some sprocket or other edge damage. The only fix would be to get a different print and hope for the bet.

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Dustin Mitchell
Phenomenal Film Handler

Posts: 1865
From: Mondovi, WI, USA
Registered: Mar 2000


 - posted 11-27-2010 07:07 PM      Profile for Dustin Mitchell   Email Dustin Mitchell   Send New Private Message       Edit/Delete Post 
Sounds like your print arrived with edge damage. Someone mis-threaded it and now one edge is 'thicker' than the other, causing the uneven wind.

Not much can be done to fix this AFAIK.

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Ed Forth
Film Handler

Posts: 11
From: Syracuse, NY, USA
Registered: Jul 2010


 - posted 11-27-2010 07:30 PM      Profile for Ed Forth   Author's Homepage   Email Ed Forth   Send New Private Message       Edit/Delete Post 
Thank you all very much for an astonishingly quick reply

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 11-27-2010 08:37 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Is there any oil on the print? If so, it is possible it ran on a ORC/CFS Super platter. Those platters have dished decks and if there is oil on the print, the print will "remember" that wind and cone its way upward on a normal flat platter deck. The only fix is to run it soundtrack down.

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Mike Olpin
Chop Chop!

Posts: 1852
From: Dallas, TX
Registered: Jan 2002


 - posted 11-27-2010 08:38 PM      Profile for Mike Olpin   Email Mike Olpin   Send New Private Message       Edit/Delete Post 
If you move it, be extra careful. It will be loose.

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007


 - posted 11-28-2010 08:36 AM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
At the time I inspected the prints carefully: they were brand new prints, no oily at all, without any kind of damages at all. I simply couldn't explain it.

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Ed Forth
Film Handler

Posts: 11
From: Syracuse, NY, USA
Registered: Jul 2010


 - posted 12-10-2010 08:23 PM      Profile for Ed Forth   Author's Homepage   Email Ed Forth   Send New Private Message       Edit/Delete Post 
Sorry it took so long for me to get back.

The print was not oily, but I tried lacing soundtrack down anyways, that didn't fix the problem, and when it was wound up soundtrack down the print had a different weirdness to it (sort of scalloped)

I definately believe that the "thinner on one side than the other due to damage" theory was correct.

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007


 - posted 12-11-2010 06:03 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
quote: Ed Forth
when it was wound up soundtrack down the print had a different weirdness to it (sort of scalloped)
Exactly what I observed. My print was brand new.

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 12-11-2010 09:25 PM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
quote: Ed Forth
sort of scalloped
Called "spoking" - like spokes of a bicycle wheel.

Comes from a slightly green print. Just leave it alone for it's just one of those things that happens when a print leaves the lab prob not completely dried out from the printing area.

I get them from time to time as well in as well as prob the lot of us gets this kind of print.

It may flatten out after a good few runs ....

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Manny Knowles
"What are these things and WHY are they BLUE???"

Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002


 - posted 12-12-2010 06:03 AM      Profile for Manny Knowles   Email Manny Knowles   Send New Private Message       Edit/Delete Post 
Resist the urge to "tap it down" to flatten it out. Doing so may add horizontal scratches to the frames and/or cause edge/sprocket damage.

And I agree with Mike -- be extra careful if you have to move this print -- just about every time this happened to me, the wind was loose.

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