How to Fix Cracks in Polymer Clay Sculpts

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Polymer clay, also known as polyclay, is a medium that is often used to make clay figurines or sculptures. The clay hardens if baked in a regular oven at temperatures below 148 degrees C. Cracks in polymer clay sculpts form due to sudden temperature changes or when you use the clay to cover a different type of material such as air-dry clay, which dilates or contracts. Fixing cracks is possible both before and after the baking process.

Fix cracks prior to baking the clay by applying liquid polymer clay with a paintbrush over the sculpture.

Bake your sculpture to the temperature indicated on the material you use (between 107 and 135 degrees C.) for the amount of time indicated (typically 15 to 20 minutes).

Identify all the areas that have cracks after baking and mark them with a piece of chalk.

Fill the cracks with liquid polymer clay using a paintbrush or a syringe, if the cracks are larger.

Wipe off the excess of material and the chalk marks with a clean piece of cloth.

Use a heat gun to set liquid polyclay prior to baking if fixing cracks on vertical or curved surfaces.

Bake in the oven for the amount of time indicated on the liquid polyclay you use. Polymer clay can be baked several times, as long as you preserve the oven temperatures below 148 degrees C.

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