Chemistry: Make Plastic Out of Milk

We made our very own plastic polymer from casein, a protein found in cow's milk.

Methodology:

Heat half a mug of milk in the microwave for 1 minute, 30 seconds.

Add 4 teaspoons of vinegar to the warm milk.

Stir slowly, small white clumps called curds form.

Strain the liquid into a sieve and place the remaining curds on paper towels.

Squeeze until all moisture is removed.

This is now casein plastic

Shape into buttons, beads, 2D shapes.

Casein plastic made from cow's plastic was first used in the early 20th century when it was used to make buttons, beads, buckles.