ps_inkling writes: "Two companies are creating different techniques to make DVD discs unusable after a set period of time. SpectraDisc has a patent on a limited-play DVD technology; FlexPlay is currently developing limited play DVD technology. The SpectraDisc technique is to coat the DVD with a film, then wrap the DVD in an anaerobic package. The idea is to sell these 'play-once' DVD movies at a substantial discount to regular DVDs as a way to compete with pay-per-view or movie ticket outlets."
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