Glassine paper is a supercalendered paper manufactured principally from chemical wood pulps which have been beaten to secure a high degree of stock hydration. Glassine paper is grease resistant, has a high resistance to the passage of air, and is almost impervious to the passage of water vapor. There are a variety of uses for it including use with analytical balances or as a slip sheet for storing artwork. It has even been used in a Kazoo to produce the sound when you blow in the Kazoo. For Conceptual Physics purposes it is used in the making of a pinhole camera. Sold in packs containing 100 6" x 6" square sheets.