How to Make Plaster Mix
Plaster of Paris is a commonly used material for creating three-dimensional molds, sculptures or other types of artwork. Plaster comes in a powdered form and must be added to water. If you are trying to mix plaster for a project, it is important to mix the plaster slowly to avoid lumps in your finished mixture. When mixed properly, plaster should be smooth and creamy and there should be no visible lumps in the container.
Things You'll Need
- Measuring cup
- 2 Bowls
- Plaster of Paris powder
- Water
- Spoon
- Vinegar
- Alum powder
Instructions
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1
Measure equal parts of plaster powder and water. Be sure the water is in a slightly larger container to accommodate the plaster mixture that will be added to it.
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2
Sprinkle the plaster powder slowly on top of the water, stirring constantly.
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3
Continue sprinkling the plaster and stirring until you have added all the plaster powder to the water. Stir the mixture until it is creamy and lump-free.
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4
Add a small amount of vinegar to the mixture to prevent the plaster from setting while you work. Only use about 1 tsp. to achieve the desired results.
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5
Add a small amount of alum powder to the plaster if you want it to set very hard. Use about 1 tsp. to achieve desired results.
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