During the 1920s and 1930s, the harmful effects of this paint became increasingly clear. One needs to have special clearance and permits in order to import or use them.Radium is a radiological hazard, emitting gamma rays that can penetrate a glass watch dial and into human tissue. ![]() It is not available for sale to the general public. It is usually stored in glass tubes and cannot be handled. This light can last for many years until the radioactive material wears off. A key point to bear in mind is this: the dial is still highly radioactive.Radium glow produces light on its own through a chemical process. Radium glow Radium dials usually lose their ability to glow in the dark in a period ranging anywhere from a few years to several decades, but all will cease to glow at some point.
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