Jess, Stefan Buda here on IIS is about the only person I can think of who might be interested in the blanks, but you'd have to give him some closeup photos of whatever markings are on the blanks - the glass manufacturer would have labelled them to indicate the glass type. This information will look cryptic to you.
Last edited by Wavytone; 13-03-2018 at 09:43 PM.
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