Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: [Homebrew_PCBs] Sulfuric acid should remove TT paper.
From: Borislav Trifonov <bdt@...>
Date: 2006-12-11
Just make sure you don't use hot acid, as the copper in it will create
sulfur dioxide, and you'll be choking on the fumes.