Homebrew PCBs

At 05:03 PM 5/8/2005, you wrote:
>--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
><stefan_trethan@g...> wrote:
>
> >
> > No, it's something entirely different.
> > The photoresist is for all intents and purposes just another
>laquer that
> > dries by evaporation of solvent.
> >
> > UV curing ink is polimerization because of UV light, not
>evaporation of
> > solvent.
> > You could just use any solvent laquer instead of photoresist, and
>spare
> > yourself the mess with exposure, IF you could print solvent laquer
>of this
> > consistency in a continous layer.
> >
> > It is not UV curing ink.
> >
>
> > ST
>
>St,
>
>Po-tay-to, po-tah-to. When the photresist is cured, it then becomes
>impervious to ecthants. The point is that the fluid is designed to
>wet out the copper substrate and adhere well.
>
>Myc
>
But because it dries by evaporation it will clog up the jet nozzles, I 
think that is what the problem is, UV ink does not get hard until exposed 
to UV, which keeps the nozzles clear on the printer.





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Cecil Bayona
KD5NWA