Oven hardening clay is a very versatile modelling material that is hardened by baking. This clay is a man-made material that will not dry out when exposed to air for a long period of time, but bakes at a fairly low temperature to a hard, often pliable surface that can be painted and decorated. The most popular heat-cured clay's are the polymer clay.
Polymer clay's are oil-based and therefore must be heated to cure, however, a home oven can be used and a kiln is not required. The baking process varies with each brand so it is always important to check the packaging instructions for each clay. To give you a rough idea, Fimo recommend you bake the clay at 110*C/230*F for 30 minutes. This will also depend on the size and thickness of the clay creation.
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Oven Thermometers Click for more |
It is a very good idea to purchase a oven thermometer because if the clay isn't baked properly it could burn or be brittle when cooled. This is a much quicker process than
air dry clay, which usually
takes at least 24 hours to dry. Polymer clay will be plastic like, waterproof and very durable if cured properly. Polymer clay does not harden completely until it is cool so will feel soft to touch when it is taken out of the oven.
Another positive factor for oven baked clay is that it comes in a wide range of colours and effects. This is great if you don't want to paint your creations or you are making a specific creation that needs a certain surface effect such as marbling or granite. If you do want to paint the clay after it has been baked then acrylic paints are one of the best to use, although your clay creation will need to be
varnished once the paints dry, in order to protect it.