Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: Mark-8 'Non-plated through holes' and 2 sided PCBs
From: AncelB <mosaicmerc@...>
Date: 2016-03-22
The dilute Nitric mix I use has a Spec. Gravity of 1.215 when fresh.
It goes UP as it dissolves copper.
Ancel