How to Make Plastic Clay

Plastic -- or polymer -- clay requires few ingredients and is simple to make.

Plastic clay is an ideal medium for sturdy, long-lasting sculptures. Though it is inexpensive to buy in bulk, those who are so inclined can whip up a quick batch using household ingredients. Also referred to as polymer clay for its use of glue, this substance has a longer shelf life and offers a faster drying time than traditional sculpting clays. Like traditional clays, sculptures made with plastic clay can be set in an oven or with an external heat source.

Things You'll Need

• Plastic gloves
• Bowl
• White glue
• Cornstarch
• Airtight container

Instructions

1. Prepare your work area. Don your pair of plastic gloves and arrange your bowl, glue and cornstarch over a protected working surface. Polymer clay is best created in a warm room, as cold temperatures do not allow the ingredients to mix thoroughly.

2. Mix one part white glue with one part cornstarch in a bowl. Determine how much of each ingredient to add based on the amount of clay that you will need; one cup of each will yield a generous batch of clay that is suitable for small to medium-sized projects.

3. Knead the glue and cornstarch together with your hands. Break up any chunks of cornstarch and mix it thoroughly with the glue. If necessary, stir with a wooden mixing spoon until the clay is smooth, relatively firm and free of any runny glue or fragments of cornstarch.

4. Place the clay in an airtight container and store it in a cool, dark place until you are ready to use is. Refrigeration is not recommended, as it may cause the clay to harden and chip.

Tips & Warnings

• If the clay is too thick to mold, add several tablespoons of water and repeat the kneading process. Add water and continue mixing until the clay is of workable consistency.

References

• American Antiquity: Plastic Clay
• Rings & Things: About Poly Clay