[time-nuts] Lifetime of glass containers

Henk Termeer henk.termeer at gmail.com
Tue Jun 16 11:01:08 EDT 2009


A better explanation<http://en.wikipedia.org/wiki/Glass#Glass_versus_a_supercooled_liquid>can
be found in the wiki

On Tue, Jun 16, 2009 at 4:34 PM, Chuck Harris <cfharris at erols.com> wrote:

> 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
> a bubble.
>
> 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
> it out.
>
> 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.
>
> -Chuck Harris
>
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