Archived posting to the Leica Users Group, 1997/11/16

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Subject: RE: 3200 speed fogging (was Airport Security)
From: "Garbutt, Robert" <RGarbutt@ncrpexec.telstra.com.au>
Date: Mon, 17 Nov 1997 07:44:00 +1000
 
 >  I think lead bags can help minimize against some, but not all, low
energy
 >  gamma radiation.  If you keep 3200 speed film in a freezer for
prolonged
 >  periods of time, there may be a risk of fogging from the radioactive
K-40
 >  isotope in frozen food.  In basement darkrooms, Rn-222 may also
cause
 >  problems in some locations.  Such background levels, over time, may
fog the
 >  film.  This may be worth testing with B- and gamma emitters to
establish

Modern life is getting so complicated, isn't it?