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Two examples of fluorescent blacklight bulbs with light fixtures and packaging and a novelty incandescent bulb. Although blacklights date to 1903 with the development of the optical filter glass Wood's glass, fluorescent ink was not developed until 1932 when the Switzer brothers were inspired by a Popular Science magazine article to experiment in their father's pharmacy.
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The most valuable lunchboxes tend to be the ones from the 1950s through the 1980s, but if you have one from the 70s it's worth looking it up. Related: 25 Rare Collectibles Worth More Than Your House.
The fluorescent dyes cause a chemical reaction when exposed to high intensity light sources (HILS) and the visual result is a fading in the colors of the inks. With paper, significant visible change in the color saturation can typically be observed within 45 minutes to one hour of exposure to the HILS.
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Examples of other psychedelic art material are tapestry, blacklight posters printed with fluorescent ink against backgrounds of velvet black which are intended for display under an ultraviolet lamp which causes the colors to glow in the dark, paisley printed cloths, tie-dyed or batiked curtains and stickers with designs and slogans written in ...
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