Can you leave polymer clay out overnight before baking?

Polymer clay is a popular and versatile medium for creating various art and craft projects. Whether you’re making jewelry, figurines, or decorative items, understanding the best practices for handling and preparing polymer clay is essential. One common question that arises is whether it’s safe to leave polymer clay out overnight before baking. In this article, we’ll explore this topic and provide guidance on how to properly handle polymer clay to achieve the best results.

The Nature of Polymer Clay

Polymer clay is a pliable modeling material composed of polymer particles, plasticizers, and pigments. It becomes solid and durable when baked at the appropriate temperature. The baking process activates the plasticizers, which soften the clay and allow the particles to fuse together, resulting in a strong and stable object.

Leaving Polymer Clay Out Overnight

While it is generally safe to leave polymer clay out overnight before baking, there are a few considerations to keep in mind:

1. Air Exposure:

Leaving polymer clay exposed to air for an extended period can lead to some changes in its properties. The clay may gradually become slightly firmer and less pliable as the plasticizers continue to evaporate. This can affect the ease of shaping and sculpting the clay.

2. Dust and Debris:

Leaving polymer clay uncovered overnight may expose it to dust, lint, or other debris that could become embedded in the clay. To prevent this, consider covering the clay with a clean cloth or placing it in an airtight container while it sits.

3. Color Changes:

Some polymer clays are more susceptible to color changes over time, especially when exposed to prolonged light or air. While leaving the clay out overnight is unlikely to cause significant color changes, it’s a good practice to store your clay in a cool, dark place to maintain its original hue.

Best Practices

If you plan to leave polymer clay out overnight before baking, here are some best practices to follow:

  • Place the clay on a clean surface or in a container to protect it from dust and debris.
  • If you’re working on a project that requires multiple sessions, consider wrapping the clay in plastic wrap or sealing it in an airtight bag to prevent drying.
  • If you notice that your clay has become slightly firmer after being left out overnight, you can knead it briefly to restore its pliability before continuing with your project.
  • For optimal results, follow the manufacturer’s recommendations for baking temperature and time to ensure that the clay cures properly.


Leaving polymer clay out overnight before baking is generally safe, but it’s important to take precautions to protect the clay from air exposure, dust, and potential color changes. By following best practices and properly storing your polymer clay, you can maintain its quality and achieve the best results in your creative projects.

Rate article
Add a comment