[PADG:1842] Aging Microfiche

[Joan Gatewood <joangate@xxxxxxxxx>]

Dear Colleagues:  We have several cabinets of diazo microfiche in our 
Documents Center.  Some of it is turning rather brown.  These fiche tend to 
be about 20 years old, but some are younger.  The text is still legible, 
but I wonder what we can expect for the future.  Also wonder if there is 
anything we can do to mitigate the process.  These fiche are kept separate 
from our silver fiche sets, but  I'm not sure if the diazo is kept separate 
in other departments in the library.


Please send your responses directly to me.

Joan Gatewood
University of Michigan Library
joangate@xxxxxxxxx