Homebrew PCBs

If you "revigorate" it with a slug of HCl after etching a board or two, over time the Fe will oxidise and settle as insoluble FeO. Then just decant it. That's how I quite unintentionally converted from FeCl to CuCl. Didn't dawn on me until I started looking at the chemistries involved.

--- On Sat, 6/28/08, Leon <leon355@...> wrote:
From: Leon <leon355@btinternet.com>
Subject: Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
To: Homebrew_PCBs@yahoogroups.com
Date: Saturday, June 28, 2008, 3:02 PM










    
            ----- Original Message ----- 

From: "Stefan Trethan" <stefan_trethan@ gmx.at>

To: <Homebrew_PCBs@ yahoogroups. com>

Sent: Saturday, June 28, 2008 6:59 PM

Subject: Re: [Homebrew_PCBs] Ferric Chloride - Alternatives



> Yes, but doesn't that just produce CuCl contaminated with dirty FeCl

> (AKA "Stain from Hell")?



Yes, but they are both etchants, so the regeneration works. Do it for long 

enough and the FeCl3 will gradually disappear. 8-)



Leon




      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]