Can I cool float glass faster?
Posted: Mon Jan 19, 2004 11:10 am
OK, I know that slow annealing is needed for glass but how slow is slow?
I am using float glass, 1/8 inch thick, sandwiched 2 and 3 layers thick. I have a large 22 c ft kiln and fire with three shelves all loaded. My kiln is very well insulated and will cool down after 700 deg at about 33 deg/hour. This is with the vent holes open and a vent fan going. This seems slow to me for the type and thickness of glass I am doing currently.
Is this about the right speed others experience? I am tempted to crack open the lid about an inch.
What is the temp you read when "its cool enough to touch"? Are you opening the kiln up at 200 Deg. I guess I am looking for a way to see the stuff faster but obviously do not want to thermal shock everything.
I am using float glass, 1/8 inch thick, sandwiched 2 and 3 layers thick. I have a large 22 c ft kiln and fire with three shelves all loaded. My kiln is very well insulated and will cool down after 700 deg at about 33 deg/hour. This is with the vent holes open and a vent fan going. This seems slow to me for the type and thickness of glass I am doing currently.
Is this about the right speed others experience? I am tempted to crack open the lid about an inch.
What is the temp you read when "its cool enough to touch"? Are you opening the kiln up at 200 Deg. I guess I am looking for a way to see the stuff faster but obviously do not want to thermal shock everything.