Homebrew PCBs

Dan, could you change something so your posts come in standard format,
with angle braces at the beginning of all the quoted lines? As it is
now, I can't tell where the quoted message ends and your reply starts.

Thanks,
Steve Greenfield
listowner

--- In Homebrew_PCBs@yahoogroups.com, Dan Pickard <dlpwebmail@...> wrote:
>
>   
> I had thought I might experience 'drag' causing the plot(scratch) to
> be erratic so I had decided to get an etch resist pen in ready for
> when it comes, I found that I can buy (WHS uk) sharpie's but only in
> blue or black, or a twin pack of black and red.
> 
> I bought a blue and a black.
> 
> I have seen advertised that a staedtler lumocolor (permanent) will
> work, but could not find one.
> 
> 
> I've had no luck with any Sharpie. The lumicolor pen you speek of is
the best one I've ever used. It has superior holding strength in acid
- but still fails (lifts off pcb) at the end of the etching process
before all copper is removed. I haven't tried the lumicolor in FC yet,
only sodium persulfate. I felt it would hold up better in persulfate
but etching time is increased so it could be a draw(no pun). I'm also
going to try the lumicolor in muratic/peroxide acid soon. I've never
tried baking the lumicolor before etching. I feel it could help...
>   Dan 
> 
>  
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