Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I have a question about starting CuCl etching. I have done the
obvious googling and reading, but have been at a bit of a loss for
this one.

I happen to have some CuO on-hand, so I have the option of going
directly to CuCl rather than go the HCl + H2O2 route or HCl + H2O2 +
copper chunks.

I know that 35% H2O2 + HCl works quite well, but there seem to be
mixed reports about etching with 3% H2O2 + HCl.

Since I only have 3% H2O2 on hand would it be better to start with
that, and the let the CuCl form naturally, or should I mix up a batch
of CuCl and start etching with that?

I am planning on using a bubbler to convert CuCl to CuCl2 over the long term.

Many thanks in advance.

-p.