omega;213812 Wrote: > I Have seen on many of my OLD cd from mid 80´s > > If i look through the sun or a bright light, on Some CD´s there are > many tiny holes in the aluminium surface! > > But some CD from the same period is perfect. > > Is this Ageing or just a bad pressing? Pinholes in the aluminium coating on CDs was pretty common back then. They were there from the start - it's not an ageing thing. I'd guess that perhaps the sputtering technology used wasn't quite perfected at the time.
But they are nothing to worry about. The CD spec requires that a hole up to 0.9mm in diameter can be completely corrected by the CIRC error correction. Tiny pinholes are much smaller than that. -- cliveb Transporter -> ATC SCM100A ------------------------------------------------------------------------ cliveb's Profile: http://forums.slimdevices.com/member.php?userid=348 View this thread: http://forums.slimdevices.com/showthread.php?t=36503
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