I just posted the article New materials being tested for Blu-ray disc.
One significant difference between Blu-ray and other current optical disc formats is its requirement to have the recording layer very near the surface, which is protected by just a 100 micron thick...
Read the full article here: [http://www.cdfreaks.com/news/14460-New-materials-being-tested-for-Blu-ray-disc.html](http://www.cdfreaks.com/news/14460-New-materials-being-tested-for-Blu-ray-disc.html)
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