Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: My toner transfer experance
From: mosaicmerc@...
Date: 2016-01-03
What wax Bob?
I use diluted nitric acid to etch copper. It works very well and lasts decades.
I have a carboyle of the concentrated stuff, diluted 3:1 with water as and when I need it.
My First carboyle (1 gallon) lasted 20 years as you can just add a bit more acid to strengthen the mix any time.