Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Alan Marconett" <KM6VV@...> wrote:
>
> Hi Zoran,
> 
> Interesting and clever idea!  
> 
> I see that the solenoid lifts the paraffin pen away from the surface
of the
> board, but what is done to keep the paraffin from running out?  Some
sort of
> capillary action to draw?


The Surface tension of liquid (on te tip point), and a small
hydrostatic pressure (a short needle), a small difference in height
between the tip point and the liquid paraffin surface, keep the
paraffin from running out.


> Is this the same paraffin used in canning of fruit or whatever in
jars, and
> also for making candles? 

Yes, it is from candle.
 
Regards, Zoran