American chemists have created stickers that could help determine whether a product is overdue. They managed to partially achieve success. Their invention is extremely important for ordinary users. After all, people are most often guided by the expiration date, which is indicated on the stickers of the products. But in fact, the expiration date is often not correct.. Sellers arbitrarily change the date of manufacture and expiration date, deceiving buyers and selling them stale goods. In such a situation, measures for determining freshness should be everyone has it.
American chemists have created their own labels based on non-organic constituents. They work on oxidation-reduction processes. Thus, we have already learned how to determine the mold in products that seem to look good, but they already have fungus inside. If this is found, the sticker changes color. Thus, the product is diagnosed.
And in the future, experts plan to expand the functionality of their tests: they want to add the possibility of identifying salmonella, Escherichia coli and a number of other infectious diseases that are dangerous to health.

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