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fbharjo commented on the word Undark
Otherwit known as delight
November 28, 2011
deinonychus commented on the word Undark
"Undark was a trade name for luminous paint made with a mixture of radioactive radium and zinc sulfide, as produced by the U.S. Radium Corporation between 1917 and 1938. It was used primarily in watch dials." (Wikipedia)
November 27, 2011