7/23/2023 0 Comments Luminous paint watchThis Super-LumiNova is still the industry’s most commonly used luminescence. This very same base formula was brought into common practice by Swiss brand LumiNova AG. Kenzo Nemoto, a Japanese entrepreneur, developed a stable and non-toxic phosphorescent paint using a compound called strontium aluminate in the ‘90s. Meanwhile, fluorescence doesn’t linger after being “turned off,” which is why it’s often used for indoor lighting and neon signs. In plain English, the difference between the two is that phosphorescence is long-lived and continues on even after it’s been activated - making it perfect for watch dials! Source: Flickr / Eric Kilby There are two types of photoluminescence, fluorescence, and phosphorescence. Even dangerous lumes aren’t used anymore, knowing about them is relevant to watch collectors even today. It’s a non-toxic and non-radioactive solution to older, more dangerous lume technology, which we’ll also cover in a moment. Photoluminescent paint absorbs light and then uses it to create a glow on watch dials. They all have their strengths and weaknesses. The most commonly used watch lume today is called photoluminescence, though tritium and electroluminescent dials are also used to a lesser extent. This is compared to incandescence, which often uses sources like fire. Luminescence is light created from a non-heated source. Here’s the first of many quick and easy science lessons. Radium and Promethium Dials: Important Info for Vintage Watch Collectors.
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