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The original "mood ring" introduced as the Mood Stone in the summer of 1975. A mood ring is a finger ring that contains a thermochromic element, or "mood stone", that changes colors based on the temperature of the finger of the wearer. Finger temperature, as long as the ambient temperature is relatively constant, is significantly determined by ...
A mood ring is an example of this property used in a consumer product although thermochromism also has more practical uses, such as baby bottles, which change to a different color when cool enough to drink, or kettles which change color when water is at or near boiling point.
"Love Tester" mood rings and necklaces sold over the past five years are being recalled after testing showed they contain high levels of lead, the U.S. Consumer Product Safety Commission said.
Liquid crystal thermometers are also commonly used in aquariums, [2] in homebrewing, [3] and in mood rings. The liquid crystal thermometer was invented by Bob Parker in California, one of many of the inventor's thermochromic applications patented in the 1970s. [4]
Marketed under the vague half-promise they might sort of help a kid concentrate, focus, and stop fidgeting, Boinks are actually just netted finger sleeves. Amazon
Because popularity is actually cyclical. For example, just a decade and a half ago, mustaches were perceived as an absolute anachronism, ... Mood rings. Image credits: fermat9990 #28.
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