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Author
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Topic: Platter Scratches
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John Walsh
Film God
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Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 09-09-2001 10:16 AM
It's most likely the film clamps. They are made of steel and will definitely scratch the platter decks. I notice many of those clamps have the leading edge ground down to resemble a knife, to make it easier to slide in under the film. After a while, that edge gets banged against something, and now there's a nick or burr.That nick or burr will now scratch the deck (or if bent the other way, the film) each time the clamps are used. You could certainly use Michael's suggestion regarding steel wool; for deeper scratches; I use the edge of a file to "carve" any burrs away, then file it to smooth it out. On newer platters, the decks are unpainted and uncoated to allow polyester film to be "grounded" to help prevent the static problems associated with polyester. Coating them might lessen this advantage. I don't know of any filler that would adhere to the small surface area of a scratch. Certainly, nothing that would make the scratches go away, so the decks look good again. My suggestion is to simply not use the clamps. I dislike them, for several reasons, but mostly because of the "knife-edge" reason. I prefer those round, "doughnut" shaped things made out of thin plywood or maisonite (sp?)
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Jerry Chase
Phenomenal Film Handler
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Posts: 1068
From: Margate, FL, USA
Registered: Nov 2000
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posted 09-09-2001 11:51 AM
Hmmm. If anyone can see a reason not to do what I'm about to suggest, please step in. I'm just musing. Why not tape a couple of strips of scrap film flat across the surface of the platter? By just taping or clamping the ends, when you need to move a print you can release one end and lift the film enough to get the clamps underneath without scratching the platter. Two strips shouldn't affect the electrical ground, and the film "lifters" could remain on the platters. The thickness should be well within the normal specs. Anyone see downsides to this idea? Now if platters had a couple of recessed areas across the width, this wouldn't be needed! I always hated putting pressure on the film to inch it up that first little bit so I could slide a clamp into place.
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Aaron Sisemore
Flaming Ribs beat Reeses Peanut Butter Cups any day!
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Posts: 3061
From: Rockwall TX USA
Registered: Sep 1999
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posted 09-10-2001 01:03 AM
>>use the no-slip strips you stick on your bathroom floor or bathtub across each platter.<<Please tell me you're kidding... You are beginning to scare me.
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John Pytlak
Film God
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Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 09-10-2001 10:15 AM
Matthew Bailey suggested: "use the no-slip strips you stick on your bathroom floor or bathtub across each platter. I think no-slip strips would be useful in preventing thrown or sliding prints."Actually, this is not a new idea! There was an invention called the Non-Slip Platter Disk (patent applied for), sold by Projection Technology, Inc. (phone: (516) 576-0767). This unique invention by projectionists Stuart Boritz, Edmund Nardone, and Andrew Fetherman fit on the platter surface, and although it didn't eliminate static cling, it helped separate the film laps if they stuck together, and provided a non-slip surface so the film roll didn/t slide. I recall that Speco had the disks on display at ShoWest or ShowEast a few years ago. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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