Homebrew PCBs

On Mon, 07 Aug 2006 22:34:53 +0200, Volkan Sahin <vsahin@...>  
wrote:

> I am also scrubbing boards. On the other hand these
> inks can not resist high alkaline solutions so you can
> try NaOH or ammonia (if you can stay in the same
> room):).
> Volkan


Hey good idea, i'll try Steve's special ammonia cleaner (i don't dare open  
the bottle with the more concentrated ammonia indoors ;-)).

Indeed - it works! Well, sort of. All the dark ink comes off, but still a  
thin much more transparent red film is left on the copper.... Not sure  
why. Does only come off with scrubbing, but much less scrubbing!

ST