How to melt & mold plastic

Written by jennifer habersham
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How to melt & mold plastic
Plastic bags can be melted and fused with an iron. (banking bags image by Alison Bowden from Fotolia.com)

You can make your own plastic figures, craft pieces or fishing lures at home. If you can find the desired mould and the plastic, you can make just about anything. When working with plastic, try using craft plastic or plastic bottles. Melting thin plastic, such as plastic bags, can be quite messy. If your project requires you to melt plastic bags, use an iron instead of the microwave. Once warm, but not melted, plastic can be manipulated by hand into interesting shapes.

Skill level:
Moderate

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Things you need

  • Molds
  • Mold release
  • Plastic
  • Scissors
  • Glass measuring cup
  • Microwave
  • Wooden spoon

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Instructions

  1. 1

    Wipe the mould clean and place on a hard surface. Liberally spray the mould with a mould release. The poured plastic may not come out of the mould if a mould release is not applied.

  2. 2

    Cut your plastic into small and thin pieces. You can use plastic from fishing lures (the worms), bottles and a craft plastic. Craft plastic can be purchased in a variety of hobby stores.

  3. 3

    Open all doors and windows. When plastic is melting, it emits a strong smell.

  4. 4

    Place the plastic in the glass measuring cup. Do not fill the cup more than halfway. Heat on high in a microwave for 30 seconds, then stir. Continue until the plastic has a syrup like consistency.

  5. 5

    Pour the melted plastic directly into the mould and air dry. If you need the moulded plastic pieces soon, place them into the freezer for an hour.

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