Envelopes suitable for packaging in ATMs. The modified atmosphere allows the preservation of the product where it is not possible to carry out the vacuum procedure. Used therefore for products such as bread dough or products that would be compressed by means of vacuum packing. Modified atmosphere is a packaging method that uses the introduction of special gas mixtures in the package. The current legislation on the use of food gas for vacuum preservation in modified atmosphere involves the use of:
Carbon dioxide (CO2) distinguished in food labels with the code E290, has a strong bacteriostatic function and is indicated mainly for bakery products such as pizzas, focaccias but also chicken and some dairy products;
Nitrogen (N2) in food labels such as E941, is a gas that does not create chemical interactions with the substances with which it comes into contact, in fact it is an odorless and tasteless compound that replaces oxygen in packaging to prevent oxidation, it is mainly used to preserve dried fruit, coffee etc ..
Oxygen (O2) with the code E948 is used at high concentrations and to maintain the oxidation of the meat and in low concentrations only for some cheeses such as gorgonzola to maintain the metabolism of molds;
Argon (Ar) distinguished as E938 has characteristics very similar to nitrogen but heavier, it is in fact used to eliminate oxygen in the packaging in a more targeted manner.