Homebrew PCBs

Using bubbling for regeneration is a lengthy process, also producing  
plenty of air containing particles of etchant (corrosive). I personally do  
not see much reason to use it if H2O2 is available (in higher  
concentrations, say 30%).
If your etchant needs regenerating during a etch you can simply add some  
H2O2, with bubbling you would have to at least pause the etch and  
regenerate for several hours. This means you need to keep a much larger  
etching bath volume.

I do not know what will happen with the brass. I'm very bad at chemistry.

ST


On Mon, 13 Mar 2006 22:11:43 +0100, Greg Codori <greg_codori@...>  
wrote:

> I just want to make sure it would be safe to introduce brass to the
>
> mixture without any dangerous changes in composition.
>
>
> I will also be doing small etchings also, but if it works out OK, I
>
> may end up selling some of my etchings, and therefore would like
>
> to "renew" the mixture using the bubbler method.
>
>
> Plus, I am used to the bubbler in the etchant to help etching
>
> speeds, along with an aquairum heater, from other etching
>
> techniques.
>
>
> Also, i wanted to make sure it would be safe to store this mixture
>
> in a Rubbermaid container, or if the mixture would create enough
>
> gasses to blow the lid off, if brass is introduced.  A previous post
>
> mentioned that brass etched in this mixture may create too much
>
> bubbling.
>
>
> Greg