ComicProLine’s OPP bags are the best plastic material available for permanent protection and storage with superior preservation characteristics. OPP Bags are 2-mil thick and made from crystal clear Oriented Polypropylene (OPP).
OPP Bags are archival safe and recommended for long term storage. OPP bags do not breakdown, turn yellow, or off-gas like regular Polypropylene and Polyethylene comic bags.
Possesses the same characteristics as Mylar (a Polyester film), but at a more economical price, and like Mylar, OPP Bags are naturally resistant to chemicals, oils, grease, moisture, and ultra violet rays.