Posted on June 6, 2024January 21, 2025 by Dale Phillips Questions: Ossifying Wood Questions: Ossifying Wood by Rick Rubin Originally published in American Lutherie #95, 2008 see also, Questions: Ossification of Guitar Soundboards by Benz Tschannen Rick Rubin from Spokane, Washington responds to Benz Tschannen’s question in AL #89 and AL #93 on the use of sodium silicate, aka water glass, for ossifying wood: I’d refer you to the article I wrote in 1990 (Big Red Book of American Lutherie Volume Two, p. 362). Save yourself the grief: sodium silicate is very destructive to your tops. I was glad to hear that you’d just been experimenting on samples and not on an instrument yet.