I've just been playing silly buggers with my heat treating oven. A firing schedule I found somewhere for slumping bottles - which was very detailed - hasn't exactly given me the results I expected. I'm waiting for it to go through the annealing cycle, after which I expect to be able to retrieve a very, very flat Newcastle Brown bottle. I'll probably try the same program on a wine bottle; it's got more thermal mass, so might not get to such a co-operative flow temperature quite so quickly. Wonder what I'd be fishing out if I'd put a couple of bottles in?
Still, it's a salutary lesson (despite the obvious variables - differences in kiln responses for example); there's a certain amount of care and attention needs to be applied to advice read online.
Even mine
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