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The food warning sticker is a product that is attached to the food packaging and is more intuitive to remind people whether the food has expired through the color change. When the package is opened,The sticker will appear in red, yellow and green over time. The red color has expired and the yellow color represents
the upcoming Expired, green represents the security period.
Yangtze University
Jingzhou, China
Yanlong Zhao,
Yangtze University
Lisha Xu,
Yangtze University