Is it good to laminate or seal things in plastic bags to keep them safe from airborne pollutants and high humidity?
In general, its not a good idea to seal memorabilia in bags. For most storage environments, sealing items in bags only traps the harmful gases being emitted by the items themselves. This can accelerate decay! Plastic page protectors are safe because they are open on one end. Plastic storage bags and boxes are safe for photo print storage but not long-term negative, slide, home movies, or newsprint storage. For negative, home movies, and newsprint storage, use acid-free, lignin-free, paperboard boxes that have passed the PAT. Use polypropylene slides pages in binders for slide collections.
