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Topic: Is it time to bring back the projectionist ?
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted October 31, 2015 10:33 AM
If I recall correctly, DVD Rot is caused by oxidation of the reflective layer of the disc. To make the discs as cheap as possible, manufacturers use an aluminum reflective coating on the disc. But of course aluminum gradually oxidizes and becomes dull, non-reflective, aluminum oxide. There is a very thin transparent plastic layer over the disc for protection, but oxygen molecules can still permeate through that layer. So its all a matter of how long it takes to oxidize, but eventually all discs with aluminum reflective coatings will fail. The answer is to use a gold reflective surface, but that would up the price of discs tremendously. If the surface of the disc looks like a coffee stain, it is a sure sign that disc rot has started.
-------------------- The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection, Elmo GS1200 f1.0 2-blade Eumig S938 Stereo f1.0 Ektar Panasonic PT-AE4000U digital pj
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