--- In
Homebrew_PCBs@yahoogroups.com, Adam Seychell
<adam_seychell@y...> wrote:
> Cathode current density (C.D.) normally between 10 ~ 20 mA/sq.cm.
> Are you getting hydrogen from the PCB ?
YES got real tiny bubbles also if i change amps as u describe it
> If so then C.D. is too high or copper too low.
the copper must be to low then.
can i do the same thing again with the terra cotta pot (if needed)
with the same solution.
> To check approx. copper sulfate concentration make up a test
> solution of your desired concentration (e.g. 80 g/L CuSO4.5H20)
> and put it in a test tube. Then take sample of plating solution
> and put into a identical test tube and fill to equal height. Look
> though the end of each test tube and compare the color.
> This will get you +-20% accuracy which can be good enough.
>
>
>
> roel_cnc wrote:
> > Hi,
> >
> > I'm trying to get me bath plating but it isnt working as it
should be!
> > only thing i got is a dark brown easely wipe of film
> > pcb is 10 sq cm power supply gifs 1,8 volts ad 0,7 amps
> > also tryt a 5 volt make same result only faster
> > have to tell the bath solution is made as adam's style with a
> > terracotta pot - acid is pritty blue
> >
> > gr. Roel
> >
> >
> >
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