Glass is tested for strength - glass fibre curtains are shown.
Various types of toughened glass are tested and demonstrated.
C/U of a man holding two pieces of glass up in front of his face, looking carefully at them. He inserts the pieces of glass into a special box which is used to inspect the glass. The glass is turned and patterns are formed in polarised light.
L/S of a piece of glass balanced on two blocks. James Holt (?) stands on the glass to demonstrate how tough it is. Various shots of him bouncing on the glass.
M/S of a woman emerging through some white curtains - they are made from glass fibre. Narrator makes a joke about having to ask the window cleaner to wash the curtains too.
Woman sits beside a groovy glass table and looks at a sample book of patterned fabric - presumably glass fibre.
A steel ball is dropped onto glass to test its breaking point. C/U of man picking up a shard of glass. A piece of toughened glass is tested - the ball is put into a metal tube at measured point.
Narration ends about how toughened glass will lead to the time when people who live in glass houses WILL be able to through stones.
Note: paperwork states that this is Pilkington Glass Works although not stated in commentary. The woman looking at curtain samples is Christine Jefferies.