Homebrew PCBs

Luther - thanks for the hydrogen peroxide idea (and thanks to Rolan
for this also). I may try it tomorrow since I don't see much change
after 24 hours with the lid off the etch tank, except a few more blue
spots; maybe ten 1/4" long bits on the many copper wire above acid
level. I know someone who is a hairdresser and I think they have
access to inexpensive hydrogen peroxide so I'll see what concentration
it is and if its cheaper than drug store grade.

Grant

--- In Homebrew_PCBs@yahoogroups.com, luther m stroud <dukes500@j...>
wrote:
> I made my cucl like you with copper and hcl . adding some drug store
> hydrogen peroxide 3% on the bottle will help get it strarted .  the data
> on some graphs i was looking at said etch is best at 35c about 2,5 molar
> cucl  and  a saturated with sodium cloride also in that same bath of
> etchant. allows you to use less hcl.    wonder if you can heat the air
> you bubble to warm the solution  rather that cool it .  good luck with
> your etcher project.