émanation du radium - translation to french
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émanation du radium - translation to french

INSTRUMENT DIALS PAINTED WITH RADIUM-BASED PAINT
Radium-dial; Painting radium; Radium clock; Radium dials; Radium paint
  • November 1917 ad for an Ingersoll "Radiolite" watch, one of the first watches mass marketed in the USA featuring a radium-illuminated dial.
  • Radium was initially touted as a positively salutary substance, as this January 1922 ad from the ''Buffalo Times'' illustrates.
  • Wristwatch produced for the US Army during World War II showing characteristic sandy deterioration of radium–zinc sulfide painted hands and numbers. Such a watch should not be opened due to the danger of inhalation of airborne particles.
  • ultraviolet light]] to increase luminescence
  • Three radium dials and a radon detector are placed in a sealed plastic container. After 6 hours, the radon level was 446 pCi/L.

émanation du radium      
n. radium emanation

Definition

emanation
(emanations)
An emanation is a form of energy or a mass of tiny particles that comes from something. (FORMAL)
N-COUNT

Wikipedia

Radium dial

Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials were produced throughout most of the 20th century before being replaced by safer tritium-based luminous material in the 1970s and finally by non-toxic, non-radioactive strontium aluminate–based photoluminescent material from the middle 1990s.