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What You Need:
What To Do:
- Pack the play dough into the empty margarine tub until it is about one
half full. Make the surface smooth.
- Coat the item you are going to make a cast of with a thin film of oil.
Make sure it is thoroughly coated so the play dough will not stick to it.
- Press the object firmly into the play dough, making a clear, deep imprint.
- Remove the object and set the play dough aside for two days so you have
a hard "fossil" mould.
- When completely hardened, coat the "fossil' mould with more oil, again
making sure it is thoroughly covered.
- Mix the plaster of Paris and the water together (be sure to follow the
safety precautions on the plaster of Paris box).
- Pour the mixture over the top of the mould and set aside to dry in a warm spot. This
will take a few days but do not be impatient because the plaster must be completely set
before being moved.
- When set, carefully separate the plaster and the play dough. Now you have a cast,
which has the outward shape of the item used to make the mould.
What's Going On?
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