Ditmar on fri 23 apr 04
At least clay is somewhat forgiving.=20
After a week (or more) of firing and annealing a cast glass piece, you =
never open a kiln until it's almost dead cold. ( at least...I don't !!) =
A thick glass piece can still be considerably warmer at the core than =
the outside edge. Enough to fracture it if removed from the kiln too =
soon, due to internal stress.=20
The Mt. Palomar mirror needed to cool about a YEAR before polishing =
could start on it.
Be patient. It's easier to wait than to make it again !!!! =20
Ditmar
=?iso-8859-1?q?Marilu=20Tejero?= on sat 24 apr 04
Ditmar,
I did work with glass and understand the process, have a look at my page, ACHACHILAS, the tops are lead crystal, the bases anagama fired clay.
Ditmar wrote:
At least clay is somewhat forgiving.
After a week (or more) of firing and annealing a cast glass piece, you never open a kiln until it's almost dead cold. ( at least...I don't !!) A thick glass piece can still be considerably warmer at the core than the outside edge. Enough to fracture it if removed from the kiln too soon, due to internal stress.
The Mt. Palomar mirror needed to cool about a YEAR before polishing could start on it.
Be patient. It's easier to wait than to make it again !!!!
Ditmar
Marilu
Mango Hill, .... but no mangoes on sight..
Hialeah... more like MiamiCUBa ... meeameeKooba
NW Miami, looking at it from the south
FL yeah
http://www.geocities.com/SoHo/Exhibit/3051
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