There was a presentation at the 2013 Kansas City ARSC conference about the lac bug. See "All Natural Discs" Jacob Smith, Northwestern University.
Curtis L. Peoples, Ph.D.
Associate Archivist, Crossroads Music Archive, www.crossroadsofmusic.ttu.edu
Unit Head, Crossroads Recording Studio, http://library.ttu.edu/crossroadsrecordingstudio/
Southwest Collection, Texas Tech University
P. O. Box 41041
Lubbock, Texas 79409-1041
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From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of rod smear
Sent: Wednesday, May 21, 2014 2:09 PM
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Subject: [ARSCLIST] Shellac?
Came upon this while reading Lewisohn's Tune In Beatles biography: "Shellac is resin produced from the secretions of the female lac beetle in trees in India and Thailand". I had no idea. What was the percentage of shellac used in those 78's? Anyone have additional information regarding shellac?