--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> > BTW the 6/6 and 8/8 rules test pcb work properly. Only problem i
> > have now
> is the ink does not hold up to etchant (CuCl) as well as toner. The
> last
> board i cured with 300C hot air, and it turned out 90% ok, but on one
> edge
> the traces were still attacked (pink).
> I hope i can sort this out, ferric chloride is a lot less agressive to
> resist...
>
> thanks
>
> ST
>
Maybe it's too acidic? I tried the HCl + H2O2 mixture once, and made
it too strong, it ate right through the toner and the permanent marker
I had used to touch it up.