Homebrew PCBs

> Bill Carr wrote:
>
> If for example you put a hypothetical two-part
> etchant in the cyan and yellow ink tanks, then
> printed the negative areas in green, you could
> print the etchant right on the PCB.

I think it would need to be a pretty strong
etchant :D

If you placed a totaly uncoated copper board in
fresh persulphate or ferric etchant with the
board submersed under 10mm of etchant - the
etchant will be a long way to exhaustion before
the job is over.

I don't know - But I reckon that 0.1 mm would be
a biggish ask to spray onto a copper board from
an ink nozzel without it just running.  So that
etchant would have to be 100x stronger than the
normal etchants people use.


> I speak with the wisdom of ignorance: I don't
> know what the various etchants are, so I am
> free from all those pesky details.

Don't worry - I pride myself on my ignorance.
As they say ignorance is bliss :D