How to Mix Lightweight Gypsum Ceiling of Paris?

Plaster is used to make a variety of different shapes and molds. At home, it is often used to make hand casting and other simple molds. Children like to work with plaster because it is nice, somewhat messy, and can be cast in a wide variety of forms. Plaster can be cumbersome, however, so the correct ratio should be used to make a lightweight patch that will not be extremely heavy.

What you need to  Mix Lightweight Gypsum Ceiling of Paris?


  • Plaster
  • Hot water
  • Thermometer
  • Plastic bowl
  • Scale
  • Measuring cup
  • Disposable Spoon
  • Mold
  • Cooking spray
  • Butter blade

Step to Mix Lightweight Gypsum Ceiling of Paris


  1. Heat water thoroughly up to 75 - 100 degrees Fahrenheit. The lower the water temperature, the longer the plaster finds to mix and adjust. It does not matter the weight of the patch which temperature of water you use, so just decide if you want the piece to be fast or slow. In general, if you try to mold something with details like a handprint, you want to set the patch quickly.
  2. Determining the ratio of water to the plaster you want to use. A 50-50 split will make the lightest plaster while making a mixture between 50 and 75 parts of water to 100 parts of gypsum for a stronger mold. Use the scale for measuring the proportions of plaster and water, or you can use a measuring cup. As you apply a lightweight patch, do a 50-50 split between water and plaster.
  3. Pour the water into a disposable or plastic container. Do not add a piece. Pour the plaster into the water as long as possible to get maximum results then stir while adding plaster. This is the best way to prevent clumps from forming in the plaster. Make sure the water is absorbed with a piece of cast powder before you add more plaster to the dough. After you have poured all the powder into the water, the mixture should be stirred continuously until thoroughly mixed
  4. Pour the mixture into the mold you want to use. Shake the mold gently for any air bubbles that may occur in the plaster. If you make a handshake or any other frame, spray your hand with cooking spray for you in the mold. This will help prevent sticky substances from sticking to your hands.
  5. Put the paint and do not disturb it for 24 hours. Do not let children or pets hit the mold while it dries.
  6. Remove the plaster from the mold by pulling on the edges of the frame's container. The patch should drop to the right. If this is not the case, you can release a butter knife from the fungus plaster.
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