-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 andrewm wrote: > If you let the HCl H2O2 just keep going to emerald green you will get > CuCl etchant. You never again need > to add H2O2 and can regenrate it by bubbling air through it. That CuCl story sounds very interesting. To be quite curious (and because I didn't get it yet), I'll sum it up
So you simply mix a HCl/H2O2 etchant the usual way. When you begin to use the etchant, it's bluish. After some time (and some PCBs) it becomes green. So when it's green it's CuCl etchant, isn't it??? > I have been using CuCl for a bit over a year now and all I ever need to > do is measure the acid levels and > density and then top up with HCl or water to keep it in spec. What tools do you use for measuring the acid level? How to you measure the density? Actually I don't have a complete lab at home, so I want to keep things as simple as possible. Do you have any links about CuCl? TIA - - C. Lechner -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG5/33Wo2QgtqY4K8RAg3kAKC2MDtwIvtPtbQsU7pzQAEK2Ip9OQCgupzn aUVH3S20CoR9g1QSk1Kdd98= =Kcf5 -----END PGP SIGNATURE----- _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
