Chad Spalding. n.d.. “Char 4 – World’s Most Popular Barrel.” Independent Stave Company. https://www.iscbarrels.com/char-4-worlds-most-popular-barrel/.
Char #4 heat treatment alters the wood compounds available to the maturing spirit
Chad Spalding. n.d.. “Char 4 – World’s Most Popular Barrel.” Independent Stave Company. https://www.iscbarrels.com/char-4-worlds-most-popular-barrel/. Opening explanation of char #4, Article lines 25–27, ISC webpage lines 25–27.
ISC webpage lines 25–27
Article lines 25–27
Spalding n.d., Opening explanation of char #4, Article lines 25–27, ISC webpage lines 25–27
Opening explanation of char #4
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