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 =========== > In message <[email protected]>, 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] _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
