View single post by Tony Duronio
 Posted: Sat Apr 4th, 2009 11:24 am
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Tony Duronio



Joined: Thu Sep 29th, 2005
Location: Clinton Twp, Michigan USA
Posts: 12862
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 romano wrote: Newer lume materials are based on chemical compounds that absorb light and then slowly release it.  Other lumes were based on radium(before ~1970)  and then later  tritium both radioactive elements. Tritium still in use that what the T in T-Swiss-T markings means.
So that means the symbol is to denote a radioactive material "was" used or not??