Useless Google

You Learn Nothing From Them

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If You Type In

" What Does Blu-ray Disc Made Of "

They Said Polycarbonate

Simply Idiot

I Knew That There is PolyCarbonate As Protective Layer

But The Thin Layer For Data is 

" Silver Metal "

Like Cd is " Aluminum Metal "

Very Thin Coat

So, The Blu-Ray is Thin Coat of Silver Metal

I Knew Polycarbonate Layer Ok Google

What The Matter With You

Useless Learn Nothing From Google

Waste of Time and Effort Search on Noisy Google