![]() ![]() The most common posts appear to change a bit from blue to purple when exposed to ultraviolet (UV) light. ![]() They glow because they have been printed with fluorescent ink, which also contains phosphors – substances that emit visible radiation after being excited by invisible rays such as X-rays, gamma rays, and ultraviolet light. Flocking can be either done by hand or a machine and requires special equipment to prevent damage to the print surface itself. This gives it a furry, velvet-like appearance when exposed to UV light. What is a flocked blacklight poster?Ī flocked blacklight poster is an item that has small fibers on the surface of the paper. They can be silk-screened with glow paint by hand or they can be printed on a special machine that prints them automatically. What are they made of?īlacklight posters are typically made with UV reactive glow ink and paper. While there was only one company that sold them originally now there are a number of different companies that sell them as well. They were first marketed commercially in 1965 by the Landoll Corporation who sold them until 2009. They use a high amount of contrast between the black material around them and the bright colors they’re printed with. ![]() These types of images are called “fluorescent.” While it depends on the particular design, many use an art style that’s very reminiscent of psychedelic artwork in America from the 1960s.
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