Bob_xyz wrote:
> If the short etch does show signs of residue, can the board be rinsed
> and additional developing attempted? Or is it all over at that point?
>
> Regards, Bob
Yes, I've done that before and it seems to work a 2nd time just ok.
Note: the residue is invisible. I've seen it as an extremely thin clear
film that peals off the copper when scrapped with a pin while viewing
under a 40X microscope.
>
> --- In Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@y...>
> wrote:
> <snip>
>
>>Rinse then, etch for 20 seconds. If copper does not
>>turn matte pink in some areas then there this is signs of
>
> photoresist residue.
>