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Grandpa Pencil
learns how to make
Plastic from Milk



learn how to make
Plastic from Milk

Make your own easy plastic at home from milk curd (casein) to build your own ornaments.

After a few experiments to get your volumes right and determine your drying times,
you will be able to make a range of personalised plastic objects.

Make buttons, beads, brooches, models, dolls or even a pencil box that is exclusively yours.


  • 300 ml Milk
  • 1 tablespoon vinegar


You will need

Straining cloth, spoon, saucepan, a bowl that will hold the milk and a suitable mould.



  • Warm the milk in a saucepan without boiling it
  • Add a tablespoon of vinegar and stir in.
  • A thick, white material will form in the milk. This is the cassein that will make your plastic.
  • Strain the milk through a straining cloth, into the bowl, and squeeze the straining cloth until it holds only the sludgy stuff.
  • Form the cassein into your chosen mould and allow to dry and set.
  • The moulds might be interesting chocolate moulds of jelly moulds or just about anything else that takes your fancy.
  • If you are making brooches or drops push your pins, clips or rings in while the mix is still wet. Then you can paint or decorate it with glitter.


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