Dear Robert, I have no idea what the stuff is made of... but the correct name is 'CORFAM'. As recently as two years ago I obtained replacement leather & glue from Baldwin as a 'kit' to replace this interesting (...and useless) material. I look forward to your article. Hope this helps. Sincerely, Jeffrey T. Hickey, RPT Oregon Coast Piano Services TunerJeff @aol.com
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