Re: PCB Etching (again!) - chemicals used


Nico Coesel wrote:

> I bought the stuff I use from Farnell.

Ahhh, fair enough. I don't actually check RS and farnell, much - their
prices depress my poor uni student budget too much. ;-)


> If it is too strong or too warm, it will strip all the resist of the
> board (happened to me once). If it is not strong enough, it won't
> strip all the exposed areas. Temperature is also important. I always
> use the developer at room temperature. I usually use around 25cc of
> developer for a small board.

Hrm, that's interesting -- mine's definately not too strong, but I'm
thinking it could be too weak. Some areas didn't develop properly, and
I just presumed it wasn't exposed enough in my light box. Shouldn't it
be the sort of thing that I can just leave it in the developer for
longer if it isn't concentrated enough?

Ta,
Michael

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