ANNEALING UNKNOWN float GLASS
Posted: Wed Sep 18, 2013 3:32 pm
Happy Holidays, everybody,
I am using a float piece of glass.
I picked it up in the fields, near my home [there was an enormous pile of broken pieces of glass somebody threw away there].
The glass is 0.5" thick.
I only want to soften the edges [ instead of coldworking it], because it would create nice un-normal edges, yet not cutting. This should serve as a base to a glass piece of mine. And I like the result.
But I keep playing, hesitating, not REALLY knowing what I do - even if I write the details of the firing.
If I open the kiln while firing the glass looks unchanged, but when I take it out of the kiln, I realise the edges softened but not enough.
I feel like blind - - -
I do not know at what temp. the glass will soften enough , but not change its shape,
and I do not know how to anneal it.
Additionally I worry about devit...
It seems that this is strengthened glass [ I remember you used a particular adjective, but do not remember the word]
I read at Graham Stone that annealing temp of float is 555 C. [ 1031F]
One of my qestions is - is it safe enough to go down in temprature without staying at a certain point - for annealing? Just allow the kiln [paragon, old one but works great], to go down on its own pace?
I do the softening at 1400F.
Hopefully I have been clear enough to get more enlightening remarks from you
many thanks
Havi
I am using a float piece of glass.
I picked it up in the fields, near my home [there was an enormous pile of broken pieces of glass somebody threw away there].
The glass is 0.5" thick.
I only want to soften the edges [ instead of coldworking it], because it would create nice un-normal edges, yet not cutting. This should serve as a base to a glass piece of mine. And I like the result.
But I keep playing, hesitating, not REALLY knowing what I do - even if I write the details of the firing.
If I open the kiln while firing the glass looks unchanged, but when I take it out of the kiln, I realise the edges softened but not enough.
I feel like blind - - -
I do not know at what temp. the glass will soften enough , but not change its shape,
and I do not know how to anneal it.
Additionally I worry about devit...
It seems that this is strengthened glass [ I remember you used a particular adjective, but do not remember the word]
I read at Graham Stone that annealing temp of float is 555 C. [ 1031F]
One of my qestions is - is it safe enough to go down in temprature without staying at a certain point - for annealing? Just allow the kiln [paragon, old one but works great], to go down on its own pace?
I do the softening at 1400F.
Hopefully I have been clear enough to get more enlightening remarks from you
many thanks
Havi