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Author Topic: STATIC!!!!!! John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 12-05-2003 07:36 AM                        Most liquid fabric softeners and the "Bounce"-type dryer fabric softener sheets contain a quaternary ammonium conductive anti-stat that increase the conductivity of fabric fibers, helping discharge any static buildup.  |  IP: Logged Bruk Mogos Film Handler Posts: 19 From: USA Registered: Nov 2003 posted 12-05-2003 09:15 PM                     Hey Richard I been running Speco LP 270 platters new and old models, on 24 screens and I can count the time I had static with my fingers. Also I never used and static cling products, the cause is to keep your booth clean and keep the humidity 50-60% RH,also I clean the platters with 70%Isopropyl rubbing alcohol which you can find in any local store, and wipe with regular paper towel.Try this it might work for you too. Good luck  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 12-10-2003 02:10 PM                        I have a CNR platter that is very sensitive to static (just one on 11!). It has no particular differences between the other but feels before the others when the climatic conditions are not good. This summer we had many brain wrap on this platter since the AC system blown and we stayed for one month without AC (veeery hot and moisty!). Now that is cold the AC system works a lot and the humidity dropped to minimum (we don't have humidifers... not yet!). Today my projectionists called saying that the same platter had brain wrap continuously. But I can understand, all of our prints are warped as John said. My temp solution is to switch off the AC system (11 projectors are enough to have a decent temp in the booth!) and put an electric cable connected to ground that touch the platter continuously. I hope that I'll have my humidifiers soon. My question is: can the static be caused both by low humidity and by high humidity?? Why this platter has static problem in both cases? John, Why should the humidifers be evaporative? Bye A  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 12-10-2003 02:26 PM                        Very high humidity and dampness causes the film's gelatin emulsion to soften and become physically more sticky, but usually not static problems. Very dry conditions cause static because the lack of any moisture makes film emulsion less conductive. Here is an article I wrote: "All That Sticks Is NOT Static": http://www.film-tech.com/manuals/H5056.pdf If your film is not winding evenly, it's likely that very dry conditions have caused excessive curl: http://www.kodak.com/US/en/motion/support/h1/baseP.shtml#characteristics EVAPORATIVE humidifiers add needed moisture to the air efficiently by simply blowing air through a wet filter or wick made of paper, ceramic, or foam. Steam humidifiers are very expensive to operate, as they actually have to boil the water. Vaporizers and ultrasonic humidifiers that spray a mist of water into the air can get nearby surfaces WET, causing damage to film or electronics. They also put the minerals that are in the water into the air, so that when the water evaporates, it leaves a salty white deposit.  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 12-10-2003 03:27 PM                        Thanks john A  |  IP: Logged Jean-Pierre Van Hoof Film Handler Posts: 21 From: Enschede, Ov, Netherlands Registered: Dec 2003 posted 12-10-2003 04:23 PM                        Had some very bad static discharging in our theater and found out that it was caused by the rollers. Since we changed them for the full carbon ones no more problemos. All our platters are earthed and so where the rollers but that nylon on polyester running was causing big sparks and film trowing.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 12-11-2003 07:10 AM                        Jean-Pierre wrote: quote: Had some very bad static discharging in our theater and found out that it was caused by the rollers. Since we changed them for the full carbon ones no more problemos. As noted before, even though Kodak VISION Color Print Film has a transparent scratch-resistant conductive anti-static layer on the backside, it still needs a PATH TO GROUND to fully discharge any static buildup. Those conductive carbon rollers you installed provide that path! Another option is to periodically treat non-conductive rollers and surfaces with a conductive anti-stat like Staticide, Static Guard, etc..  |  IP: Logged Travis Hubrig Expert Film Handler Posts: 175 From: Minot ND, USA Registered: May 2003 posted 12-11-2003 01:20 PM                     I like to wear a wet towel on my head while building up prints... No, actually I don't... I have had very few staticy ?sp prints, and with my properly timed AW3's even static can't stop 'em.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 12-11-2003 01:58 PM                        Travis Hubrig wrote: quote: I have had very few staticy ?sp prints, and with my properly timed AW3's even static can't stop 'em. Good for you! And North Dakota winters lead to some pretty bone dry conditions indoors when the heat is on! Bet you had lots more problems before Kodak VISION Color Print came on the scene a few years ago.  |  IP: Logged Jean-Michel Grin Expert Film Handler Posts: 222 From: Geneva & Lausanne, Switzerland Registered: Jul 2002 posted 12-11-2003 02:07 PM                        The best solution for countries where "Film guard" is not avaible, is to use parafine oil (sorry for my weak english, I mean: the liquid wax for candles) and treat the edges of the film. we had a lot of problems on ours Strong Alpha platters of brainwarp, but waxing the film was a good issue. believe me ! Good luck, and don't strangle the guy who invented the static electricity, is dead a lot of century ago ! Bye  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 12-11-2003 02:57 PM                        quote: Good luck, and don't strangle the guy who invented the static electricity, is dead a lot of century ago ! One of the guys who "invented" static electricity has his picture on a hundred dollar bill ($100 US Treasury Note). Ben Franklin I should be so lucky for being one of the Kodak team that helped control static on polyester prints.  |  IP: Logged Will Kutler Phenomenal Film Handler Posts: 1506 From: Tucson, AZ, USA Registered: Feb 2001 posted 12-16-2003 11:48 PM                     Static cling should not be a problem on AW-3's First, Aluminum rollers are available for the pay-out head. Using one of these rollers will help improve the electrical ground. 2: providing a proper electrical ground from the AW-3 electrical plug via the buildings electrical system. 3: FILM-GUARD! 4: Spraying a very light coat of clear clothing anti-static spray on the top of the print as it lay on the platter deck. 5; I forgot who makes them, but there is a hula-hoop available for AW-3 decks which will prevent the print from flying off the deck should static cling occour. These hula-hoops fit on the lip of the outer diameter of AW-3 decks.  |  IP: Logged

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