How To Use Plaster of Paris

Plaster of Paris comes from the powdery, shining white substance that was originally found in Paris. The deposit was abundant. It was discovered that it would harden when it is mixed with water. Perhaps the most important use of this substance is in the field of law enforcement and medicine. The substance is used in law enforcement to make imprints of tire tracks. The tire tracks or foot prints are transferred by using plaster of Paris. As a matter of fact, there are some doctors that use the same to ensure that the bandage of patients with broken limbs would not be able to move the limb until it is healed. There are also some that are used for handicrafts.

Here is how to use plaster of Paris.

  • Determine the accurate ratio. For small amounts, the measure used is one cup of water combined with two cups of plaster of Paris. The finished mixture would be about one and a half cup.
  • Estimate the ratio of water to plaster of Paris for your chosen project. To do this, you can pour water in your intended mold up to the depth that you want. Now, you would need to measure the water in the mold by the use of cups.
  • Say, you used a certain bowl up to half, when you poured out and measured you had 4 and a half cups of water. Then, double that up. You would need to use 9 cups all in all since when you combine the water and the plaster of Paris, you would only come up with half the amount of both. In this 9 cups, water to plaster of Paris ratio would come up at 3 is to 6.
  • Mix the water and the right amount of plaster of Paris. Using a big bowl for the two ingredients, pour in the plaster of Paris substance, then make a well or hole in the middle of the substance, pour in all the water into the well and mix them until the concoction is smoothened. This is now ready for pouring.
  • Slowly pour the liquid on the chosen mold. Make sure that the mold is filled at the bottom first and that there is no air at the bottom. You should use the mixture all up at once. It cannot be stored as a smooth mixture but only as a hardened and molded structure.
  • Let the mold sit. The mold would need to sit for some time so that it would harden. As it hardens, it would make up for the hardened shape of the mold.
  • Carefully remove the plaster of Paris starting at the side edges. Make sure that you can catch the molded plaster.

Plaster of Paris is ideal for making wonderful beads, ideal for jewelry making. You would also be able to make simple piñatas by pouring out the molds in balloons. Some favorite animal molds can also be great with plaster of Paris.


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