15 Apr
2017
15 Apr
'17
8:52 p.m.
My experience with thermal fax paper is that printed copy is best
preserved. I discovered a couple of years ago, that manufacturers'
faxed copies of data from the early 1990s have faded almost to
unreadability.
Not black, but faded, as with disappearing ink
Storage was in a file folder in a file cabinet in temperature and
humidity-controlled environment not exposed to light for very long at all
I've had blue-line copies similarly fade after about 40 years.
Thermofax, anyone?
--Chuck