SEM film
2019-02-20 05:05:44
That is, a special coating is applied on the surface of ordinary food packaging film to enable it to detect special functions of bacteria. If the content of harmful bacteria in the packaged food exceeds the food hygiene standard, the use of such film packaging will make the original transparent and colorless. The packaging film becomes a warning color, making customers immediately aware that they are no longer edible.
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