How to make a block of polystyrene

Have you ever wondered what goes into making a block of polystyrene? Here is the ‘recipe’ for making polystyrene. 1. You’ll need a few cups of 1mm polymar beads 2. Steam the beads until they rise to about 4mm 3. Bake in the block mould at about 80kpa for approximately 4 and a half minutes…

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