Is polymer clay toxic if burnt?

Polymer clay is a popular and versatile material used by artists and crafters for a wide range of creative projects. However, concerns about the safety of polymer clay when subjected to high temperatures, such as burning, often arise. In this article, we’ll delve into the topic of whether polymer clay is toxic if burnt and explore the safety considerations associated with heating polymer clay.

1. Composition of Polymer Clay

Polyvinyl Chloride (PVC):

Polymer clay contains PVC:

Polymer clay is primarily composed of polyvinyl chloride (PVC) particles suspended in a plasticizer. When polymer clay is heated, the plasticizer softens the PVC particles, allowing them to fuse together and harden during the cooling process.

2. Emission of Fumes

Fumes and Safety:

Heating polymer clay can emit fumes:

When polymer clay is heated to the recommended baking temperatures, it may emit low levels of fumes. These fumes are generally considered to be minimal and are not typically harmful when proper safety precautions are followed.

3. Safety Precautions

Proper Ventilation:

Work in a well-ventilated area:

When working with polymer clay and subjecting it to high temperatures, such as baking, it’s important to work in a well-ventilated area. Adequate ventilation helps dissipate any fumes that may be released during the heating process.

Use of Oven Thermometer:

Monitor the baking temperature:

Using an oven thermometer to accurately gauge the temperature of your oven ensures that you are baking polymer clay at the recommended temperature. This helps prevent overheating and potential release of excessive fumes.

4. Burnt or Overheated Clay

Changes in Appearance:

Burning polymer clay can lead to color changes:

When polymer clay is burnt or overheated, it can undergo color changes, become discolored, or develop an unpleasant odor. These changes are often indicators of overexposure to high temperatures and may affect the appearance of your clay creations.


While polymer clay is not inherently toxic when burnt, it’s important to exercise caution and follow safety guidelines when working with polymer clay and subjecting it to high temperatures. Proper ventilation, monitoring baking temperatures, and avoiding overexposure can help minimize the emission of fumes and prevent unwanted changes in the appearance of your polymer clay projects. By adhering to these safety considerations, you can enjoy working with polymer clay and creating beautiful, safe, and durable creations.

Rate article
Add a comment