So what's the answer? Well this glass makes ideal frit for pottery when smashed with a hammer. By placing a layer of small pieces in the base of a pot the glass fuses to the base to create great effects. I use it with porcelain, stoneware and earthenware and finds it behaves in different ways in the kiln. It can crackle or, with finer frit, make a smoother, denser colour. I have used it on unglazed pots and also on slip and even coated it with a clear glaze. (See my example test pots below).
I have some of this scrap for sale here and am selling 200gms for £5, which is a lot of glass and will last for a few pots. I have mixed colours or colour themes and all glass will be safely posted wrapped in bubble wrap in a cardboard carton.
To see more scrap glass visit my Folksy Shop.