> > I think you mean cutting glass with scissors underwater. I used to think
> > that was an old wives tale, but I've heard of people doing it.
>
> I used to work with an optics guy, he told me that it helps. I guess
> the water would absorb some of the vibrations, its probably the same
> principle with scissors. It would also lubricate and cool it, and
> might even save you from some nasty cuts if the glass breaks.
There's some sort of chemical reaction that happens when you score the
glass, it gets into the crack and widens it. Can't remember at the moment,
and too lazy to Google it.
You sometimes see old-timers score then spit on the glass, running it down
the line. Glass wants to break in all directions, this helps the break go
where it's suppose to go.
The scissors thing is an old trick, it does work for funny shaped stuff like
bottles, but you're still better off with the 'score & snap' method.
Tony