OK, mine looks just like that but no etching. As I said in the earlier post, I let it heat and bubble for about 24 hours with no joy, so I added an additional 1/3 Cup of HCL...Muriatic acid that I use in my pool. --- In Homebrew_PCBs@yahoogroups.com, <homebrew_pcbs@yahoogroups.com> wrote: Forgot to mention. here is what mine looked like. http://thesn1per.blogspot.com/2013/06/diy-circuit-boards-tachometer.html The color you see is the result after about 1 hour of mixing with a small piece of coper bubbling the entire time. I used no heat. Im in Florida the ambient temp is quite hot as it is. I tried heat on previous times the results ere the same. I will add as time goes on the mixture will become a darker shade of green. I hope this helps. Sam --- In Homebrew_PCBs@yahoogroups.com , "thesn1per" <mail4sam@...> wrote: > > Pink? should be green or some shade of. > Sam > > Read this. > http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/ > > > > > --- In Homebrew_PCBs@yahoogroups.com , <twgray2007@> wrote: > > > > OK, I tried bubbling air through the mixture for about 24 hours with no change. I heated to about 40 C and placed a PCB in just to test and after about 25 minutes it had just started to turn pink from etching. The volume was at about 1/2 gallon and to this I added about 1/2 cup of HCL and left the board in for another 30 minutes with little change. > > > > I think I will now put a lot of copper wire in, at 40 C and let it run to see if it will "take off", as you put it. > > >
Message
RE: Re: CuCl etchant - an update
2013-09-04 by <twgray2007@...>