Homebrew PCBs

On Mon, Mar 11, 2013 at 11:38 AM, Leon Heller <leon355@...>wrote:

> **
>
>
> On 10/03/2013 21:20, Rick Sparber wrote:
> > Leon,
> >
> > So is there a % concentration I should look for?
>
> 90% should be OK.
>

I don't think you want to be anywhere near 90% H2O2, unless you are making
rocket fuel.  I had a bottle on 60% once, and it is truly evil stuff,
oxidises your skin instantaneously.  I find the 40 vol stuff (12%) you can
buy off the shelf is perfectly ok for etching purposes.


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