Guardhouse glassines are a made of a PH neutral, semi-transparent, 55 gsm paper with no harmful chemicals. Safe for stamps and coins, they are also commonly used to protect collectibles, photos, negatives, invitations and other crafts. Other uses also include seed storage, entomology and postcards.
Guardhouse glassines are carefully constructed with flaps folded on the exterior of the envelope, leaving only a smooth interior pocket surface that will not catch on stamps or other contents.
