Re: Heat Death of the Internet

Scott Alfter <scott@alfter.diespammersdie.us> wrote:

There's also a difference with recordable media.  CD-Rs and DVD-Rs use
organic dyes that in some cases have proven to be somewhat less than stable.
Some cheaper BD-Rs (of the "LTH" variety) also use these dyes, but most of
them use an inorganic phase-change layer that should be more durable.

This paper notes a study that disagrees:
"A study looking at the stability of Blu-ray media has shown that
 overall, BD-Rs (whether they are the dye or the non-dye type) have
 rather poor stability compared to some CD-Rs and DVD+/-Rs (Iraci
 2018)."
 https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes/longevity-recordable-cds-dvds.html

Unfortunately "Iraci 2018" is behind a paywall.

They do give "BD-R (non-dye, gold metal layer)" 10-20 years in a
good storage environment, and curiously "BD-RE (erasable Blu-ray)"
gets 20 to 50 years.

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