Homebrew PCBs

Thanks Ben.

I read somewhere that the best mix for H2O2 + HCl is:

"20% H2O2 at 35%
20% HCl at 32%
60% water to etch the copper. This needs to be done outside (vapors), the board is etched in 30s"

Would a beauty shop have 35% H2O2?

I also read that some people use a heater to warm up  HCl + H202 or CuCl2 etchant just like in case of FeCl3!

Does heating help?



>________________________________
>From: Ben L <bhleavi@...>
>To: Homebrew_PCBs@yahoogroups.com
>Sent: Sunday, July 17, 2011 7:04 PM
>Subject: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
>
>
>  
>
>> I am finding it difficult to obtain > 3% H202 myself, and since the only purpose of H202 is to generate oxygen, I would very much like to know how to generate ozone instead, as I believe it's a much stronger oxodizing agent?
>> 
>> Also - I meant to ask everyone: is heating HCl + H202 or CuCl2 etchant useful the way it is in case of FeCl3 or is it simply a misconception?
>> 
>
>I normally use a air pump to pump air into the tank.
>
>Try a Beauty Supply for stronger than 3%.
>
>Ben_,___ 
>
>

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