![]() Joseph, who was a chemistry major at the University of California, Berkeley, worked with Robert to investigate fluorescent compounds. His doctor confined him to a dark room while he waited for his sight to recover. After a fall, Robert suffered a severe head injury that resulted in a severed optic nerve. The invention of black light paint is attributed to brothers Joseph and Robert Switzer in the 1930s. Black light paint should not be confused with phosphorescent (glow-in-the-dark) or daylight fluorescent paint. The paint may or may not be colorful under ordinary light. It is based on pigments that respond to light in the ultraviolet segment of the electromagnetic spectrum. Bodypainting with fluorescent paintīlack light paint or black light fluorescent paint is luminous paint that glows under a black light.
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