Glassine

Printed glassine envelope for the photographer Arthur Weston, c. 1900
Glassine envelope

Glassine is a smooth and glossy paper which is air-, water-, and grease-resistant. It is usually available in densities between 50–90 g/m2 (0.010–0.018 lb/sq ft). It is translucent unless dyes are added to the paper to color it or make it opaque. It is manufactured by supercalendering: after pressing and drying, the paper web is passed through a stack of alternating steel-covered and fiber-covered rolls called a supercalender at the end of the paper machine so that the paper fibers are oriented in the same direction.[citation needed]

Usage

Glassine is most commonly used as a base for further silicone coating for the manufacture of release liner. Glassine is also used as an interleaving paper in bookbinding, especially to protect fine illustrations from contact with facing pages; the paper can be manufactured with a neutral pH and can prevent damage from spilling, exposure, or rubbing. Glassine adhesive tape has been used in book repair. In chemistry, glassine is used as an inexpensive weighing paper. It is applied in foodservice as a barrier between strips of products (for example: meat, baked goods). Glassine is resistant to grease and facilitates separation of individual foodstuffs.[citation needed]

Glassine has been recommended for protecting the surface of stored acrylic paintings.[1] However, glassine will adhere to soft (not completely cured) and medium-rich paint, especially when stored for an extended period of time and it may cause permanent damage to the painted surface. Therefore, art conservators do not recommend that it be used to wrap paintings. Philatelists use glassine envelopes to store stamps, and stamp hinges are made of glassine.[2] Amateur insect collectors use glassine envelopes to store specimens temporarily in the field before they are mounted in a collection. Entomologists collecting for research may likewise use such envelopes to store whole specimens in the field. Glassine envelopes carry pharmacy reformulated drugs and illicit drugs such as cocaine and heroin.[3][4] Photographers used glassine sleeves for many decades to safely store their processed films. Glassine is also used to pack firecrackers, as it is moisture resistant. It is used for its transparent qualities to fold origami tessellations.[5][6] Glassine is an outer covering on paperboard tubes, particularly those used in model rocketry, for water protection.

In the mid-20th century, potato chips were packaged in glassine bags.[7] Herman Lay was a pioneer of using glassine in the potato chips industry.

References

  1. ^ The Acrylic book - A comprehensive resource for Artists © Liquitex Artist Materials 2007
  2. ^ Stamp hinges aren't perfect, but they do help Archived 2015-05-04 at the Wayback Machine Michael Baadke
  3. ^ "60,000 Glassine Bags of Heroin Seized in Westchester". DEA. 2006-11-28. Law enforcement officers arrested Thevenin at that location and recovered two boxes containing approximately 60,000 individually packaged glassines of heroin.
  4. ^ "DEA 'Brand' Used to Market Heroin". DEA. 2008-08-04. Archived from the original on 2008-08-22. Retrieved 2008-09-01. the DEA raided NUNEZs residence in the early hours of July 31, where heroin glassine bags (used to package heroin) were found that contained the official DEA Agency emblem.
  5. ^ "Andy's Tessellation Page". www.spundreams.net. Retrieved 13 April 2018.
  6. ^ "Origami Tessellations". Origami Tessellations. Retrieved 13 April 2018.
  7. ^ Burhans, Dirk E. (2008). Crunch: A History of the Great American Potato Chip, p.33. Terrace Books, Madison Wi. ISBN 978-0-299-22770-8.

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