Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi guys,

i have tryed before, and restarted now to experiment with
electroetching, as an alternative method to FeCl3.

I and up with the same problem all the time. The electric courent is
peeling off any stencils i'm using. I have tryed toner, different
paints i've found here in the house(few oil based,acrilic,enamel), and
even sticky tape( :) ).I have also tryed different acid for
electrolite ( H2S04, HCl, acetic)in different concentrations, to see
any improuvement, but the result is the same:
-if I put the board, with the selected stencil in the acid,without
power connected to it, it lasts ok,

- if I apply electricity to it, to start electroetching, it works ok
for a while, but after some time, the stencils are peeled off, for a
reson i do not undestand nor can prevent yet.

- I have tryed to electroplate the board, to check if the peeling
happens, and of course it does not.

- I have tryed different current densities, but the peeling still
happends...some times sooner, sometimes later.

any ideeas what am I doing wrong ?

thanx,
Mihai