Homebrew PCBs

Good idea, I see no reason why it wouldn't work. I'm going to try it
myself, I'm from AUS and H2O2 is just too expensive here


--- In Homebrew_PCBs@yahoogroups.com, Kerry Koppert  wrote:
>
> I live in a small largely agricultural country any chemical is
difficult
> to obtain (unless it has a household or agricultural use). I'd like to
> try hydrochloric acid and hydrogen peroxide as an etchant and I can
buy
> HCl in the hardware store (for cleaning concrete) but H2O2 is a little
> more difficult $25 / litre for 35% plus hazardous goods freight from
> 300Km away. Sodium Percarbonate is cheap and readily available as a
> cleaning agent. In solution Sodium Percarbonate becomes sodium
carbonate
> and hydrogen peroxide. It seems to me that a mixture of hydrochloric
> acid and sodium percarbonate would end up as hydrochloric acid,
hydrogen
> peroxide, salt and carbon dioxide. Has anyone tried percarbonate in
this
> way as an etchant?
>