Ways & How

how to make plaster molds

how to make plaster molds

Plaster molding is a very serious job. If you have the skill, you are more likely to be hired by big industrial companies at above-average compensation. Although how to make plaster molds is technically demanding, one can study the fundamental steps. When you are confident to try the actual plastic molding, follow these guidelines:

  1. The main reason why plastic molding is a complicated task is that you will be dealing with toxic chemicals. Like the professionals, do not take chances and protect yourself first before anything else. Wear a mask to avoid breathing the plaster dust. You will also be dealing with sticky materials such as silicone, so it is best to protect your working area by covering it with plastic. Follow the directions carefully to avoid accidents or wasting the substances.

  2. Get acquainted with the ingredients needed. Choose the best modeling plaster. Quality plaster chemicals are normally in powder form. Get a minimum amount of them. You will also need a one-time use of recycled clay, so get the cheapest one available.

    Prepare at least 4 wooden boards measuring 8 inches by 12 inches or 20 by 30 centimeters in the metric system. Ideally, the boards must be larger than your mixing bowl by at least 3 times. You will also need 8 nails, hammer, a sturdy, no-handle tea bowl shape, plus a water bucket will complete your tools.

  3. Plaster molds must be locked in place when making them so as to be able to create a firm base. A plaster holder will be constructed first prior to the plaster mold itself. This can be done by putting together the four boards. Nail them down temporarily so that it can be disassembled easily after the molding process. The inside boards must be a box form without the bottom part. Place the box flat on your protected working table. Attach pieces of clay on all the joints. All overlapping must be covered to stop any leakage. Put in place the bowl shape right in the middle of the box. Moisten and push it a little so that it will be securely positioned. Mark the height of the bowl. Do another marking which is 50 per cent higher than that.

  4. Do the plaster mixing as indicated on the package using the bucket. Use rubber gloves so that you can mix it with your hands. You can easily eliminate any lumps by doing this. It will not take more than 15 minutes before curing occurs. Before it sets up, pour the plaster on top of the bowl shape reaching the second mark. Just leave the excess mixture inside the bucket.

  5. Allow the plaster to dry up. The next day, it will be totally hardened. The hardening will happen just after 2 hours, but it’s better to leave it longer to cure. Disassemble the boards carefully. The clay bowl will just pop out after drying. Now you’ve made a tea bowl mold.

How to make plaster molds is a challenging activity. Being aware of the hazards can make the procedure enjoyable. Another thing to watch out for is the right consistency of the plaster mixture. It must look like the batter of a cake mix before pouring it to the bowl shape. Do not use the new mold prematurely. You can be sure of this by allowing it to cure overnight. You’ll be glad you did, and you can now make as many tea bowls as you need. Store in a cool and dry place when not in use for longer life.


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