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• n  any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity

• Some substitutes that work: coconut milk, casein, isinglass (fish gelatin), pectin.
• Alsifilm is already being used to replace mica (isinglass) in electric motor and generator insulation.
• Mica, which laymen know as isinglass, is mainly used in peacetime as a nonconductor for electrical equipment.

• mica

News & Articles

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• Isinglass River trout restocking draws crowd in Rochester
  Nature lovers of all ages took pride in helping restock the Isinglass River Saturday morning.
  Oct. 21, 2013 - New Hampshire Union Leader
• Beauty at Trap Falls
  A heron makes its way across a shallow part of Trap Falls Reservoir in Shelton on Monday, as seen from Isinglass Road with the fall foliage in the background.
  Oct. 15, 2013 - Huntington Herald

Quotes

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• George Hacker in Newsweek
  There are hundreds of multisyllabic things that go into processing alcohol, from fish bladders-called 'isinglass', used as a fining agent to clarify wine-to myriad other things that people might shudder about if they knew what was in there,...