[time-nuts] Lifetime of glass containers

[J. Forster]

Early glass likely did not have to be perfectly clear, but just to
transmit light.

Here is an interesting (if commercial) site:

http://www.glasslinks.com/history.htm

-John

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> In message <4A37AD7F.1090806 at erols.com>, Chuck Harris writes:
>>J. Forster wrote:
>
>>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.
>
> The problem is that you don't get very clear glass using any kind
> of surface, because pretty much everything you can think of using
> for the base will contaminate the glass, either as particulate
> matter or chemically.
[snip]