Homebrew PCBs

Volume 40 developer for hair dye is about 12% 

Lower volume numbers of course have less peroxide in them

 

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Saturday, April 07, 2018 5:23 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Question about etching pcb's

 

  

Look for clear hair bleach. I think it's around 12% (40 deg. Baume?);
strong enough to burn your bare hands. 
I understand janatorial supply shops have it even stronger, but it
starts to get dangerous and these days may find the police checking
you out.

I got mine from the local Sally Beauty Supply. 
In this part of the US they seem to show up
near WalMarts.

On Fri, 6 Apr 2018 21:45:00 -0700, you wrote:

>Copper clad board using muriatic acid would like to find better than 3%
>hydrogen peroxide if possible. In the usa LA california to be exact.
>Also what are some of the better methods of making a pcb cheaply
>BTW if needed I have 99 uv led on a circuit board built that a while ago
>just would need a cheap uv kinda etch resist suggestions welcome there.
>terramir

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