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Topic 18 of 23: Glass Work

Sun, May 28, 2000 (12:16) | Wolf (wolf)
Be it blown glass, etching, stained, painted, post it here.
6 responses total.

 Topic 18 of 23 [crafts]: Glass Work
 Response 1 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (22:10) * 37 lines 
What is Glass?

As defined by the American Society for Testing Materials, glass is "an
inorganic product of fusion which has cooled to a rigid condition without
Glass is a product of heating silica sand and other ingredients in a furnace
at temperatures of 2300 to 2700 degrees fahrenheit. The raw materials of
soda-lime glass(commonly used for hand-blown glass) are silica sand, soda
ash, lime, salt cake, and feldspar.
When glass is in its liquid or molten state it can be blown and manipulated
into almost any shape. Hot glass has some of the same characteristics as
honey. Above twothousand degrees Fahrenheit, glass is very runny and gooey.
A glassworker must always turn the pipe that the glass is on to prevent
it from falling to the ground as one might turn a knife or a spoon with
honey on it to keep it from dripping.
But as the glass cools, the molecules form a very rigid solid but they do
not organize into a crystalline structure.

How Glass is blown:

The glassblower takes a blow pipe (a hollow metal pipe about four and half
feet long) and dips the tip of the pipe into the molten glass in the
furnace. He turns the pipe at a constant speed to wrap up an even "gather"
of glass on the end of the pipe. Then, he exits the furnace and shapes the
solid ball of glass on the marver(a flat sheet of steel) and then blows into
the pipe to introduce a bubble into the solid mass. From there, more glass
may be added by gathering again from the furnace. When the desired amount
of glass is obtained, the glass can be manipulated into shape using the
marver, gravity, heat, centrifugal force, and a variety of specialized hand
When the piece is finished, it is placed into an annealing oven to cool.
Glass must cool down slowly in order to release the stress present in it.
The thicker the glass the more time it takes to anneal (the process of
releasing the stress in the glass). For example, to anneal glassware a
quarter inch thick, it takes about six to eight hours.

 Topic 18 of 23 [crafts]: Glass Work
 Response 2 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (22:12) * 1 lines 
The above was from I was hunting for some blown volcanic glass from Kilauea but thought this above would be a good introduction. Off to find some mouth-blown glass... /\~~~

 Topic 18 of 23 [crafts]: Glass Work
 Response 3 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (22:37) * 5 lines

I have fed this lady's husband in my home on two occasions when he was head of Hawaii Volcanoes Observatory...

 Topic 18 of 23 [crafts]: Glass Work
 Response 4 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (22:40) * 1 lines 
That bit of stained glass is a window in the HVO mentioned above. I've seen it - about 3 feet by 3 feet ( a meter square) and is absolutely gorgeous!

 Topic 18 of 23 [crafts]: Glass Work
 Response 5 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (22:42) * 7 lines 
I want this one!!!

Look a the rest of her work at

 Topic 18 of 23 [crafts]: Glass Work
 Response 6 of 6: Marcia  (MarciaH) * Tue, Aug 28, 2001 (23:01) * 2 lines 
Well, it turns out this lady has a different life from what I knew of her here.
I wonder where Dallas Jackson is now....!

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