I've found that it works better if you dab the sharpie so that the
ink kind of puddles up. Leaves a thicker layer of ink.
--- In
Homebrew_PCBs@yahoogroups.com, "ransom peek"
<ransom.peek@c...> wrote:
> First time tried to make pcb, used Sharpie Ultra Fine marker and
ferric
> chloride from Radio Shack. After 10 minutes in solution, with
> agitation, market lines were degrading badly. Stopped the etching,
> applied more marker, and etched for another 8 minutes (roughly).
Still,
> the copper areas are pitted, very much degraded - the pen just
doesn't
> do a good job - the ferric chloride does attack it.
>
>
>
> Am I doing something wrong? My plan is to go over all the traces
and
> pads with solder to ensure continuity for this prototype, but in the
> future. Do I need a different method or different marker pen?
>
>
>
> Also - I find that isopropyl alcohol does an ok job of removing the
> marker - is this a good choice?
>
>
>
> Ransom Peek
>
> Fort Collins CO
>
>
>
> [Non-text portions of this message have been removed]