Making borosilicate glass

[garishglobes]

I came across this earlier:

www.doobybrain.com/2012/11/08/how-heat-resistant-borosilicate-glassware-is-manufactured

I'm not sure that Pyrex is still generally made out of borosilicate glass, but it was fun to watch anyway - but then, I'm always a fan of watching melting glass 

[Steampunkglass]

Cool video, I quite fancy the outfit they use when cleaning the hot moulds! 

[Dragonfire Glass]

Fascinating