Philatelists use glassine envelopes to store stamps, and stamp hinges are made of glassine. Lanterns are made of washi, traditional Japanese glassine paper. A windowed envelope is an envelope with a plastic or glassine window in it. In the mid-20th century, potato chips were packaged in glassine bags. It is used to make fine paper, tissue, glassine. In chemistry, glassine is used as an inexpensive weighing paper. Some good quality books of pastel papers also include glassine to separate pages. The book is covered with a semi-transparent glassine dust jacket for protection. This sheet is supercalendered to further improve the density, creating a paper called glassine. The low opacity makes it suitable for making glassine. Glassine adhesive tape has been used in book repair. Glassine (paper) is used by artists to protect artwork which is being stored or transported. Glassine has been recommended for protecting the surface of stored acrylic paintings. Glassine is resistant to grease and facilitates separation of individual foodstuffs. Glassine is also used to pack firecrackers, as it is moisture resistant.