Paperkey 1.3 // very durable but often overlooked backup medium

vedaal at vedaal at
Tue Jan 8 18:49:07 CET 2013

Back in the shrouded mists of time, in the last millenium, before digital media were widely accessible, 
many libraries and archives used to back up data on microfiche.
Many of them had built in printers, so that 'text' data could be retrieved, printed out, 
(and then, as the technology became widely available), scanned into digital format.

The above article gives the following interesting (?overly optimistic?) durability estimate:

=====[ begin quote ]=====

The polyester material on which the images are printed is also very stable and, 
if kept in a temperature controlled environment, is estimated to last as long as 500 years.
 CD-ROMs are estimated to last for about 75 - 100 years, 
depending on the materials they are made of and how they are stored.

=====[ end quote ]=====

(as an old darkroom B&W hobbyist, I remember specific instructions on how to prepare prints for 'Archival Quality' 
[adjust development time so that the print could tolerate 2 minutes in a fixer tray without overly darkening],
this produced an estimate then of 75 year durability.)

Preserving only monochrome text probably has much greater durability.

Anyone come across specific recommendations for paper, printer, and storage recommendations for 'Archival Paper Backup'  ?



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