[time-nuts] Lifetime of glass containers
cfharris at erols.com
Tue Jun 16 14:34:39 UTC 2009
J. Forster wrote:
> Interestingly, I recently had dinner with an archeology professor,
> interested in the Etruscan period. She had just discovered a flatish piece
> of glass i9n a dig, thousands of years old, and believes it was made
> essentially like rolling out dough on a slab while red hot.
To me, it would seem that playing with a blob of molten glass in
a fire, and spreading it out, or rolling it would be a more natural
step in the progression of making glass windows than blowing
I would strongly expect that the earliest windows would have been
made by rolling the molten glass flat like it was dough.
Much later would have come the blowing of a cylinder, and flattening
In any case, there is zero evidence that glass flows at room
temperature. If it did, and 180 years was all it took for a window
pane to become all wavy, and thicken at the bottom, all of those
10,000 year old glass artifacts would be shaped like the chewing
gum blobs on a city sidewalk.
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