Quote:
Originally Posted by lacey
Larry - Is the Kervin book "More than you ever wanted to know about glass beadmaking" by James Kervin?
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Yup. Cheap softcover book with lots of great tech and safety info written in an understandable manner. As far as the annealing is concerned, realize that all of these schedules are an approximation based on general theoretical charts. Nothing is exact here including the temps most of us use as reference points. Annealing happens over a range of temps for any given glass formulation. Mine is based on the charts but more importantly 9 months of messing around with the boro I am using to see what works. I started from just holding at 1050 for an hour and then crashing the kiln as worst case which did produce a whole lot of residual stress then experimented from there. In a kiln that is better insulated than mine you might be able to get away with this.
I love the common boro colors but the clarity of the clear is what keeps me working boro.