Homebrew PCBs

On Tuesday 27 April 2004 12:18 am, grantfair2001 wrote:
> Hi Vasile-
>
> I've never blown glass but have seen it done.
>
> What did the glass pen look like when it was done? How did it write
> the ink? Did it have a "nib", or a ball, or what?
>
> Grant

FWIW,  this sounds an awful lot like some stuff that was in a _chemistry_ DIY 
book I had when I was a kid.  You'd use an alcohol lamp,  and glass tubing,  
and the two operations that they detailed involved either making right-angle 
bends or "stretching" heated glass as described here to make an "eye 
dropper".  You'd just heat the glass (the key here to prevent it from 
shattering is to go gradually and heat evenly) and "stretch" it until it was 
just short of closing completely,  then cut it in the middle.

> --- In Homebrew_PCBs@yahoogroups.com, Vasile Surducan <vasile@s...> wrote:
> > Maybe it sounds crazy for your ears, but in the comunist era we have
>
> used
>
> > for XY plotters a home made glass pen, very similar with the Staedler or
> > Rotring pens, and the result was quite amazing, the same resolution as a
> > 0.5 standard pen. You need just a bunsen gas burner, a vial and two
>
> right
>
> > hands to pull the glass.
> > The key for continuous traces was keeping down the pen (on the printed
> > surface) as much as possible.
> >
> > best regards,
> > Vasile
> > http://sudrucan.netfirms.com
>
>
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