Homebrew_PCBs

On 14/05/2012 19:24, Spencer wrote:

> I use the same solution and noticed heating doesnt help either. The
> biggest improvement in time that I get with my board came from sticking
> an aquarium air pump and with a hose with a bunch of holes that I did
> from a sewing needle into the solution. I get about 45 minute etch time
> now with my 1oz boards.

When I tried HCl and H2O2 it was very fast, with no heating.
Concentrated HCl is required,

Leon
--
Leon Heller
G1HSM