ENDPOINT AND TIME DURATION INDICATOR AND METHOD BASED ON A VOLATILE DYE
A time duration of end of product life indicator is disclosed which utilizes a volatile dye coated or impregnated into a substrate or carrier. The dye evaporates as a volatile component of the product evaporates thereby changing the color of the substrate or carrier. The consumer is alerted to the d...
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Format: | Patent |
Sprache: | eng ; fre |
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