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This topic comprises 5 pages: 1 2 3 4 5
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Topic: Non-film uses for scrap film
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Manny Knowles
"What are these things and WHY are they BLUE???"
Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002
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posted 08-13-2002 06:51 PM
Not a non-film use...but:If you're in a pinch and you're "fresh out" of RP-40, you could use a loop of green-band from a trailer to check your shutter timing, framing and focus. ~Manny (Once in the morning...and once again, at bedtime.)
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Kelsey Black
Film Handler
Posts: 58
From: Pima, Arizona, USA
Registered: Aug 1999
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posted 08-15-2002 12:45 AM
ooh, some of that 65mm 7mil non-perforated silverless leader would be great for rolling up home-brew high voltage capacitors. I wonder what the breakdown voltage is on that stock. The dielectric strength is *pretty* good for polyestar.too bad the anti-static conductive coating on vision stock isn't as conductive as aluminum foil, if it were, you could sandwich some 35mm vision stock between some 65mm or 70mm leader stock and (non-perf, of course) make a nice fat, flat and effective capacitor for tesla coiling, coin shrinking, etc. (High Voltage is a hobby of mine.) John: does bleaching with laundry bleach remove the conductive layer as well as the silver from prints, leaving behind just the estar stock (after rinsing)? *ZZZZZZzzAP!* not that I recommend that anyone actually do any of this themselves... that's what I'm here for. heh.
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 08-15-2002 06:02 AM
Hypochlorite bleach removes the gelatin-based emulsion. It will NOT remove the conductive backside coating. Resistivity is only in the 10^9 ohms per square range -- plenty enough to dissipate static, but not low enough to use as the plate in a capacitor.AFAIK, the 7-mil blue leader is bare polyester, and would be a fine dielectric. One trade name for polyester film is MYLAR. ------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
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