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Topic: One-sheet display cases
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Chad Souder
Jedi Master Film Handler
Posts: 962
From: Waterloo, IA, USA
Registered: Feb 2000
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posted 05-11-2002 09:55 AM
Jerry -You have a valid concern, I suppose, but all our back-lit cases are wood, with flourescant fixtures and diffusers installed on the inside and a metal one-sheet frame around the outside. They look and work great. Besides, if bad wiring or ballasts regularly caused fire problems, you wouldn't see any buildings anywhere with lights in ceiling tiles, or any dry wall or carpet or wood anywhere for that matter. I think the development, testing, certification, and insurance go into the fixtures and ballasts when they are made, not what you put them in. ------------------
"Asleep at the switch? I wasn't asleep, I was drunk!" - Homer Simpson
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Jerry Chase
Phenomenal Film Handler
Posts: 1068
From: Margate, FL, USA
Registered: Nov 2000
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posted 05-11-2002 03:39 PM
I'm sure that hand made cases can look great, and that the chance of an electrical problem is small. I still would not recommend them, as overheating could happen in a hidden area and not be immediately noticed. In fairness, if you are using shop-light style florescent fixtures, they already have some safety built in, but I would hope that there are at least some substantial vents to prevent heat build-up.As for ceiling lights and wallboard, drop ceiling fixtures are specced NOT to have insulation around them or be surrounded by flammable material unless they have an approved design. Wallboard is not combustable, and in fact is a fire retardant. The gypsum compound in wallboard breaks down with relatively low heat, and the major byproduct is steam. That means that until all of the wallboard has changed state, nothing on the other side of a sheet of wallboard can get above 212 degrees F. Fire safes are made from layers of gypsum board or plaster of paris for just this reason. Cost of development has to be amortized over a product run. By the time amortization wears out, usually inflation works to keep the price of the product just as high unless there are other cost savings factors at work. I understand your point that things seem to be working out well for you, but by the same token I could just as easily describe how to make a wooden lamphouse for xenon short arcs. It would work, and probably never have a problem, but wood is just not as well adapted for the job as metal. For the few extra bucks to get a professionally made display, the added safety is worth the expense. Also, there are a number of dead theatres now, and picking up used cases on the cheap should be possible.
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