[pure-silver] Re: phosphorescent paint
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 20 May 2009 07:45:55 -0700
----- Original Message -----
From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, May 20, 2009 7:18 AM
Subject: [pure-silver] Re: phosphorescent paint
"Bill" <photographica@xxxxxxxxxxx>
Was that [radium glow-in-the-dark stuff] ever shown to be
actually hazardous, or was it a perceived hazard?
I think it is the manufacturing that was found to be
hazardous.
http://en.wikipedia.org/wiki/Radium_Dial_Company
Locally, radium left from painting WWII airplane dials was
found bricked
into a backyard barbecue.
http://news.google.com/newspapers?nid=888&dat=19820617&id=FfkNAAAAIBAJ&sjid=XXsDAAAAIBAJ&pg=6754,1019625
Early 1900's pocket watches with lots of radium glow paint
could
cause radiation burns over the years if the watch was
carried
with the dial facing the body.
My watch has (had - it has expired over time) a tritium
powered
glow in the dark dial and hands.
==
Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
The girls painting the numerals on radium watches were
ingesting the paint by licking the brushes to shape them.
They got quite large doses.
In any case, I don't think there is any
glow-in-the-dark material made now which actually glows in
the dark. They store light energy which is released slowly
but if its in the dark long enough (a few hours) it becomes
invisible.
There materials even more dangerous than radium. For
instance polonium. Polonium, which was used in anti-static
brushes for negatives and phonograph records, is exceedingly
hazardous. These brushes contained very little and that is
well protected but the chemical itself is both
extraordinarly toxic, much more so than radium or KCN, and
dangerously radioactive. Anti-static devices now usually use
high voltage electricity.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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