Shaped glass

Question 1

How are narrow neck containers made?

Answer 1

~ blow and blow method

~ exposed to an injection of a sulfur/fluorine containing gas while still at high temps, rendering them more resistant to alkali extraction when in use

~ bottles are annealed at 580C and slowly cooled over 20-60min

~ a polyethylene coating is sprayed on the exterior for abrasion resistance

Question 2

What is the ribbon machine?

Answer 2

~ made in 1926, developed to rapidly make light bulbs

~ 50 bulbs/second