GunPlumber GunPlumber:
i used to convert old wine bottles into goblets. after scoring the glass with a scribe, I would rotate the scribed line through the flame of a candle. as the glass was heated, you could see the scribed line extending into the glass. followed the heat by rubbing an icecube along the line, and then gave a quick snap on the bottle to seperate it.
don't know if this technique will work on plate glass, but it might be worth a try.
We used to use a variation of that method when making improvised shaped charges. Dip a length of string in gasoline and wind it tightly a couple times where you want the cut. Light it, let it burn for a minute then plunge it into cold water. It'll snap right where the burning string was tied.
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