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Subject: RE: [Homebrew_PCBs] Salt/Vinegar/Peroxide

From: "Brad" <unclefalter@...>
Date: 2017-07-18

I tried this when I got my first bottle of ferric.  It didn’t work… it took half an hour of continuous scrubbing with the brush to get anything going… seemed like it would take hours.  Is there a particular type of sponge you use?  Bear in mind, the boards I’m doing are quite large by comparison to what I see hobbyists online doing.

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Monday, July 17, 2017 11:39 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Salt/Vinegar/Peroxide

 

 

Hello fellow home brewers,

 

On Tue, Jul 18, 2017 at 2:26 AM, 'Brad' unclefalter@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:

 

the resulting etchant is way less unpleasant than ferric

 

It is possible to etch very fast and very well if you use concentrated ferric chloride.  It is easy to do and generates a tiny amount of waste.

 

 

Forget about baths of the stuff  When you're done, you have one cotton ball and a tbsp of etchant to deal with.

 

I have tried ammonium persulphate, traditional ferric chloride baths, and HCl/H₂O₂, and this method IMO beats them all.

 

Mitch.

 

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