Another active packaging solution with antimicrobial effect is based on carbon dioxide generators. Increased CO 2 levels (10–80%) are desirable for meat and poultry preservation, because they can efficiently reduce the surface microbial growth and thus prolong the shelf life of the product (Vermeiren et al., 1999). This type of active packaging is frequently associated with modified atmosphere (MAP) systems in order to balance out CO 2 losses due to dissolution into the meat and permeation through the packaging material (Coma, 2008). CO 2 ® Fresh Pads (CO 2 Technologies) are used for meat, poultry, and seafood packaging (CO 2 Technologies, 2014).