> for a start you make a 15% HCl solution (tap water is fine)
>
Like 850cc water and 150cc hydrochloric acid? (clearifing weight /
volume, and initial strength of the acid.)
> Then you put a pcb in it.
>
One you want to etch, or just some scrap to start the proccess?
> then you put H2O2 in it.
> for the first pcb you may need more than usual.
Approx how much? (please specify strength for that amount)
Any attempt to remove the copper in the long run? Or do you dispose
and start over every so often?
> For me this etchant is ideal with toner transfer - as it is as easy
and
> fast.
> the toner takes no harm in the etchant.
> photoresist works too.
> Most ohp markers (edding etc) don't work too well.
> the best is the red staedtler ohp pen ink.
(assuming ohp = overhead projector) I thought OHP makers were water
based. I've always used permanent markers like sharpies for this job.
(though my toner transfer is almost good enough to not need it
anymore :-)
I'm probably being overly analytical about this, it's likley the
proccess is more forgiving and tolerant. But it's better to before I
stir up a mess.
Thanks
-Denny