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Topic: What to do about screen vandalism?
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 09-05-2000 01:12 PM
Rory:You might try talking to the screen manufacturers like Harkness Hall, etc. to see what they recommend for each type of screen and stain. AFAIK, most fabric screens are made of PVC vinyl or similar plastic materials. "Matte" screens are much easier to clean than "gain" screens, since the gain screens have proprietary thin coatings that are easily damaged by cleaning solutions or rubbing. The best cleaning method will vary with the type of stain. If you have extra screen material, try your cleaning method on it first, then look at the test sample with light projected on it to see if the cleaning has left a visible mark or change in reflection. ------------------ 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 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com
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Mike Blakesley
Film God
Posts: 12767
From: Forsyth, Montana
Registered: Jun 99
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posted 09-17-2000 11:16 PM
A long time ago, a kid in my theatre threw a big wad of gum at the screen...we didn't notice it until the next day. I picked it off, but it took the coating with it and left about a 1" bright white spot RIGHT in the middle of the screen. i turned the matter in to our insurance, but it was going to be six weeks until we could get a new screen, so I was really unhappy (this happened at the peak of the summer).I was totaly in despair, until I was describing the problem to a friend of mine whose wife happened to be a nail technician (she paints pictures on people's fingernails). When she heard the word, "pearlescent" she asked if the "pearl" she used in nail work might work on the screen. We decided it couldn't hurt too much to try, so we put her on a ladder with her airbrush, figuring we could always clean it off again (the stuff is water soluble). AND IT WORKED! It wasn't perfect...still looked like the screen had a slight smudge on it, since her "pearl" was a slightly different color than the original screen coating...but it got us thru the summer.
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Neil Di Scala
Film Handler
Posts: 17
From: Santa Cruz, CA, USA
Registered: Sep 2000
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posted 09-18-2000 04:11 AM
Cleaning screens is not as hard as most people think, and you get better light and focus. We had a little gang of 'screen taggers', mostly jujubes shot through a straw for a while. Cleaning spots is worse than the whole thing.I use about a TBSP (that is tablespoon, not quart) of 409 to a couple of gallons of warm water. Taking a screen brush, a small 100% cotton towel, a bucket, a light, an extension pole, and something interesting on the CD player, get to work. Drape the towel over the brush, work from the top down. Don't push hard on the fabric, there can be sharp things behind it. Rinse and turn the towel over from time to time. Check you work with a light. Tough spots can be moistened and then come back to them. This works great for matte screens, I wouldn't suggest it for gain, although it works well. A bit of chemistry-all soaps act as a kind of a magnet, attracting dirt. If you use a lot of soap, and the janitors use blowers, you can make things worse. A trick I use is once in a while use a TBSP of white vinegar to a couple of gallons of water instead of 409. Actually repels dirt, the same thing is true for carpet cleaning.
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