How to use cornstarch to thicken acrylic paint

Written by alicia bodine Google
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How to use cornstarch to thicken acrylic paint
You can thicken runny tempera paint before painting. (tempera image by Edvin selimovic from Fotolia.com)

Tempera paints are often runny because they are water-based. This is not a problem for your everyday craft projects. But if you want to create a painting with some depth you will need to thicken the tempera paint before using it. Fortunately, you can use a common household pantry item to thicken your tempera paint.

Skill level:
Easy

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Things you need

  • 2 Tbsp cornstarch
  • 1 1/2 cups water
  • Pot
  • Airtight container

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Instructions

  1. 1

    Mix 2 Tbsp of cornstarch in a small pot with 1 1/2 cups of water.

  2. 2

    Heat the cornstarch and water mixture over low heat. Stir until the cornstarch is completely dissolved in the water. Remove it from the heat.

  3. 3

    Wait for the cornstarch and water mixture to cool to room temperature. Add the mixture to the tempera paint of your choice a little bit at a time. Stop once you reach your desired thickness.

  4. 4

    Store any extra cornstarch and water thickener in an airtight container.

Tips and warnings

  • You can also store the cornstarch thickener in a plastic zipper bag.

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