![]() ![]() ![]() The lume used on vintage Rolex watches was radium-based, and radium remained the standard for nearly all Rolex lume until 1963, when growing health concerns forced a shift away from it. Radium – The First Rolex Luminous Material Tritium – A Safer Radioactive Alternative.Radium – The First Rolex Luminous Material.Let’s take a closer look at the various luminous materials Rolex has used over the past several decades, from Radium to Chromalight, and everything in between.Ĭlick here to learn more about luminous material on watches. As with everything the company does, Rolex continued to evolve and search for the perfect luminous material used on its watches, with Chromalight being the latest and greatest of them all. Since then, the entire industry has shifted to much safer options, including Rolex. You can see this on a number of vintage Rolex watches that have managed to survive to this day and still have their original luminous dials and hands. Radium was combined with zinc sulfide, which allowed for a brighter glow than pure radium alone. Initially, luminescence was achieved by using a radioactive material called radium, which was first discovered by Marie Slodowska-Curie and her husband, Pierre Curie in 1898. Some of the very first applications of luminous paint (lume) can be found on military pocket watches from the early 1900’s. ![]()
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