melting glass edges?

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From: Geoff Ruth (gruth@leadershiphigh.org)
Date: Thu Sep 30 2004 - 09:17:32 PDT 

Message-Id: <p06110411bd81e172d30f@[192.168.123.175]>
Date: Thu, 30 Sep 2004 09:17:32 -0700
From: Geoff Ruth <gruth@leadershiphigh.org>
Subject: melting glass edges?

Hello,

In an effort to save money, I bought a sheet of cobalt glass from a
stained glass company and cut it up into small squares to use in a
flame testing lab (much cheaper than buying cobalt glass from a
supply catalogue). However, these glass squares now all have very
sharp edges that students may cut themselves on.

Does anyone have a technique for melting the edges of a glass sheet
to make them rounded? If I heat the glass over a burner flame, I'm
almost positive that it will heat irregularly and shatter the glass.

I know this question is more of a materials working question than a
science question, but I'm at a loss for how to do this.

Thanks,
Geoff

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