Thanks,
Metric doesn't bother me, but that comma used as a decimal seperator
has thrown me more than once :-)
I'd like to see your tank setup, but I can wait for you to post the
final pictures.
With Ferric Chloride I had switched to etching in a ziplock bag. Toss
the board in, a little etchant, and knead it like bread in a sink of
hot water. Works good, but I was looking for somethnig I didn't have
to hold for 6-10 minutes while it etches.
I read in one of the pages in the links/acid etch section about
washing the boards in 5% HCL solution after etching, do you do this?
or do you just water rinse?
Horizontal etching, Have you actualy researched/experimented and
decided to go that way, or is it just one of those things where "this
works"? Do you get even etching on both sides? Do you need to flip it
part way through the proccess?
I've never set up an "official" etch system. In the past it's "find a
bowl/dish/tray, throw some etchant in and swish it arround till it
etches". Recently I've switched to the baggie method, but my board
production has been increasing (couple a week now) and it's getting
tedious.
Thanks
-Denny
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> 0,5mm to 1mm bubbles i have normally.
> YES this is precious metric SI.
> dunno how you live without it.
> under the board may accumulate larger bubbles in tray etching.
>
> with too much h2o2 i get bubbles, 2mm to 4mm in size.
>
>
>
>
> yes, it gets warm, 60°C i think (you may convert that too ;-) ).
> but only if i have too much h2o2. with just enough there is not
much
> heating, maybe 40°C.
>
>
> tray etching.
>
> my "permanent horizontal etching machine" is in work.
> this will be a tupperware container where the etchant stays in all
the
> time.
> the lid seals it off enough to prevent corrosion of your whole shop.
>
> until now i used different trays and poured it back in the bottle
each
> time.
>