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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 ...
"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.
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.
Related: Most Dangerous Toys of All Time. Amazon. Bruised shins, America. America, bruised shins. ... Mood rings were supposed to be as individual as the teens who emptied the shelves of them ...
Thermochromic ink (also called thermochromatic ink) is a type of dye that changes color in response to a change in temperature. [1] [2] [3] It was first used in the 1970s in novelty toys like mood rings, but has found some practical uses in things such as thermometers, product packaging, and pens. [4]
No question bedevils a man more than whether his female companion is in the mood for a frolic. Now a new lipstick promises to tip off the state of a woman's libido by changing color as she warms ...