The holes would be tin, solder, or silver plated. All three are
etch-resistant.
DJ Delorie wrote:
>
>
>
> "donahn" <donahn@... <mailto:donahn%40yahoo.com>> writes:
> > It seems like this would be the ultimate rapid prototyping kit using
> > toner transfer, especially if you were only using through-hole
>
> How would you prevent the FeCl from etching the barrels in the holes,
> and disconnecting the two sides?
>
>
>
>
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>