Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: Phosphoric Acid Etch
From: "dsv1486" <darrell.vandenberg@...>
Date: 2004-04-07
It was very inexpensive as I purchased it from a hydroponics shop
that was closing. It was $5 for 5 gallons of 89% concentration. I
did not notice the evaporation issue and while etching I did not
notice any smell. Does anyone know what chemical reaction is going
on?? I think it is making copper phosphate. I will try another test
and let everyone know how it went.