>--- In Homebrew_PCBs@yahoogroups.com, <homebrew_pcbs@yahoogroups.com> wrote:
>Curious When you say slow.
>How long is that?
Almost a gallon of solution, with a small aquarium bubbler,24/7 for 6-8 months.
>from what I gather I would say 1/2oz per 5-10 mins is about the average.
>depending on factors like. agitation, bubbles,heat and the CuCl level.
I think more like 3- 45 minutes for 1/2 ounce copper, agitated by hand.
I have not kept close watch on the solution for a long time, I don't know if it has 'aged' well in CuCl, or just spent itself on contaminants. Yes, I reed to run a test sample soon to find out how it currently works.OR maybe through another 50 - 100 grams of copper in there to let it chew onKE
You could always drop a test piece (1/2x1/2 pcb) in and time it. when done stick it along with the notes about its times and particulars. this way you can have some way of knowing what to expect in the future.
I do feel obligated to ask. when you said
"> I left mine bubbling over the winter. "
how long was that really for? Ive never left mine bubbling for more than an hour ... ever.
(the 1 hour period was a stress test and break in)
Sam
--- In Homebrew_PCBs@yahoogroups.com , <mbushroe@...> wrote:
>
> I left mine bubbling over the winter. It is now a dark green and very opaque. On the other hand, I have not etched a new board in quite some time, so I don't know if it has gotten better or worse. But before I left it bubbling, the fresh hydrogen peroxide and hydrochloric acid solution, even after heating in the microwave, was still very slow.
> Mike
>