Plastic comestible
Will Miller, Benjamin Batsford
Vancouver Technical, Vancouver Technical Secondary
Floor Location : J 034 D

Plastic? In milk? Well, sort of. You made a substance called casein. It’s from the latin word meaning “cheese.” Casein occurs when the protein in the milk meets the acid in the vinegar. The casein in milk does not mix with the acid and so it forms blobs. True plastics, called polymers, are a little different. If you want to make a true plastic and learn more about polymers, try the Homemade Slime experiment. What to do.Ask your friendly adult to heat up the milk until it is hot, but not boiling
Now ask the adult to carefully pour the milk into the bowl
Add the vinegar to the milk and stir it up with a spoon for about a minute
Now the fun part, pour the milk through the strainer into the sink – careful it may be hot!
Left behind in the strainer is a mass of lumpy blobs.
When it is cool enough, you can rinse the blobs off in water while you press them together .
Now just mold it into a shape and it will harden in a few days. Materiels One cup of milk
4 teaspoons of white vinegar
A bowl
A strainer
Adult help