Make Plastic Milk

<u> Make Plastic Milk: </u>

* One cup of milk
* 4 teaspoons of white vinegar
* A bowl
* A strainer
* Adult help

1. Ask your friendly adult to heat up the milk until it is hot, but not boiling
2. Now ask the adult to carefully pour the milk into the bowl
3. Add the vinegar to the milk and stir it up with a spoon for about a minute
4. Now the fun part, pour the milk through the strainer into the sink - careful it may be hot!
5. Left behind in the strainer is a mass of lumpy blobs.
6. When it is cool enough, you can rinse the blobs off in water while you press them together .
7. Now just mold it into a shape and it will harden in a few days. - Cool!


Plastic? In milk? Well, sort of. You made a substance called CASIN. It's from the latin word meaning "cheese." Casin occurs when the protien in the milk meets the acid in the vinegar. The casin in milk does not mix with the acid and so it forms blobs. True plastics, called poymers, are a little different. If you want to make a true plastic and learn more about polymers, try the Homemade Slime experiment. Have fun!