Homebrew PCBs

On Tue, 18 Apr 2006 18:41:11 +0200, mycroft2152 <mycroft2152@...>  
wrote:

> Hi Voltan,
>
>
> I volunteer. Send me the pcb's, I live in the US. I'll mix up a
>
> batch of etchant to Stefans specs.
>
>
> If you want I'll mail you some of the thin pcb material that I have
>
> been using.
>
>
> Let's trade addresses off group.
>
>
> I'll be online this afternoon and can be contacted through Yahoo
>
> Instsnt Messenger -- Mycroft2152
>
>
> TANSTAAFL!
>
>
> Myc


I can not give directions to mix something up.

It should be tested with CuCl, with measured density and known molarity,  
well regenerated. This can not be done from HCl and H2O2 "fresh".
Without knowing the HCl molarity the results would not say much. A quickly  
mixed together H2O2 HCl etchant "just for the occassion" is not telling me  
much, it is probably more agressive than a maintained CuCl etchant.

It would also be interesting for many to try fresh "one time" HCl H2O2  
etchant, but it would be easy for anyone with real CuCl to mix up a tiny  
amount, while the reverse is much harder.

ST