What is Plaster of Paris and How to Make it at Home?
Plaster of Paris Recipe
Plaster of Paris is a Calcium sulfate semi-hydrate (CaSO4,½ H2O) derived from Gypsum, a calcium sulfate di-hydrate (CaSO4, 2H2O), by firing this mineral at relatively low temperature and thus reducing it to powder.
CaSO4, 2H2O + HEAT -------> CaSO4, 1/2 H2O + 1.5 H2O
In 1700’s, Paris was already the “Capital of plaster” since all the walls of wooden houses were covered with plaster, as a protection against fire. The King of France enforced rule after the big fire in England 1666.
Large Gypsum deposits near Paris ► Mined ► Manufacture of Plaster of Paris
Watch Video on How to make Plaster of Paris Step By Step Guide
(Apparatus) to make plaster of Paris with glue
- 2 parts Diluted White Glue
- 1 part Warm Water
- Large Mixing Bowl
- Spatula or Wooden Spoon
Instructions and procedure
- Gather all the materials and spread a sheet on the work surface.
- Now, pour the glue in the large mixing bowl and beat it well.
- Make a paste, by adding one part warm water to two parts of white glue.
- Mix the ingredients well. Continue stirring them, until there no visible lumps remain.
- If you do not get a soupy mixture, you can add more water to the bowl and mix well.
- The final product should be watery, but with a slight white glue consistency.
Properties of Plaster of Paris
Uses of Plaster of Paris