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Lots of consumers are used to paying no attention to the shelf-life on the package of food, which will sometimes cause them to bring expired food home. Freshcode is made from a kind of intelligent ink.
With setting of the shelf-life when packaging it, it could display the fresh degree of the food visibly. On one hand the length of the barcode will get shorter and shorter as the expiry date approaches; On the other hand, the exact number of days to the expiry date can also be seen beside it. When it reaches the baseline, the machine will not recognize the barcode, thus reminding both the supermarket and consumers.