From: Tony Seaton ()
Date: May 17, 2008
Subject:
Re: temperature and CD/DVD's
At 19:25 14/05/2008, Larry Austin
wrote:
>As a user/collector of CD's and DVD's, I have intuitively
>believed that their storage temperature was not a factor, as
>with LP's, etc.
>
>But do fairly extreme temperatures do harm to CD's and
>DVD's???
Yes, absolutely.
Where heat caused warpage to vinyl, it accelerates decay in the
bonding of the layers of a CD, eventually rendering some, or all, of
the content unreadable.
Furthermore, the radiation from direct sunlight can (very quickly)
destroy the metallic layer that hold the data: my late father, an
Astronomer and Physicist of some distinction, had a study with a
south-facing window looking out over a valley for the last decade of
his life. The damage that I witnessed occurring to a small pile of
CDs he left on his windowsill for just a few months a couple of
summers ago surprised us both.
The fact that these things are "burned" and read by lasers does not
make them immune to sources of radiation that we might consider
rather less harmful.
Tony
Tony Seaton
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