QA

Quick Answer: Does Polymer Clay Expand When Baked

Polymer clay does not shrink or expand. So if you are worried your polymer clay frog figurine will shrink to the size of a pea in the oven, have no fear.

How do I know when polymer clay is done baking?

You can’t really tell by feel if the fusion process is complete. The only way to tell is to actually attempt to break a piece. Fully baked polymer clay will bend before it breaks. *** Underbaked polymer clay will snap in two or crumble when you try to break a piece in your hands.

Why does my polymer clay break after baking?

Sometimes your polymer clay beads will break even after you’ve baked them. If the temperature is too low your polymer clay will not cure properly. Improperly cured clay is very weak and brittle, and susceptible to breaking. Certain polymer clay brands are more brittle than others.

What happens when you put polymer clay in the oven?

This material softens a bit in the oven before the polymerization process is complete. This can cause flat, shiny spots if you’re baking on a hard surface. To keep the shape that you want, you need to rest your beads on a surface that conforms to the bead or support it without resting it on a flat surface.

Is polymer clay flexible after baking?

Polymer clay is not like regular earthen clay that cures rock hard. Polymer clay, like Premo Sculpey for example, remain flexible when baked, especially when thin.

What happens if you dont bake polymer clay?

Yes, polymer clay can burn if you do not bake it according to package instructions. Just like anything you would bake in the oven, if you bake clay too hot for too long, it will burn.

Does polymer clay ruin your oven?

You’ll see that polymer clay does not release toxic fumes and does not create a residue in your oven when baked as directed. Or even when baked a little hotter than directed. When polymer clay burns, however, it does release hydrogen chloride gas, which is caustic and will burn your lungs (but is not exactly toxic).

Can you bake polymer clay on foil?

You can safely bake polymer clay together with Aluminium foil without any problems, which makes it perfect for creating a core four your polymer clay project.

Can you bake polymer clay on glass?

Lots of artists like to use glass work surfaces. They are easy to clean, easy to find, and work well with oven bake polymer clays. In fact, if you are making window clings with Liquid Sculpey you will want to make them on glass so that they will be smooth enough to stick to windows when they are done.

Do you need to cover polymer clay when baking?

Polymer clay must be baked long enough and hot enough to get complete fusion. When baking on tile, to keep the back of your item from being shiny, bake on a piece of copy paper or cardstock. The oven’s element can be fiercely hot, causing browning even when the temperature setting is correct. Always cover your work.

How thick can you bake polymer clay?

Polymer clay should be baked for at least 30 minutes for each 1/4″ of thickness. This means that a 1″ thick bead will need to be baked for two hours. Yes, this is correct. If your oven is truly baking at the correct temperature, your clay will not burn.

How do you harden polymer clay without an oven?

When you don’t want to cure clays that harden at a specific temperature in the oven, you can use a heat gun, hair dryer or heat-embossing tool set to the desired temperature. Place the polymer clay creation on a nonstick surface, such as a piece of ceramic tile or block of wood.

How do you keep polymer clay flat when baking?

To prevent brown spots from oven spikes, tent your work with aluminum foil pans or an index card. To avoid flat spots on beads, bake them on quilt batting or a bead baking rack. You CAN bake your polymer clay more than once! This is a common practice for intricate pieces.

Can you bake polymer clay after painting?

Yes, you can easily bake paint onto polymer clay in most cases. It seldom bubbles or burns, but some paints will change color with the heat, especially if they contain a dye.

Can you boil polymer clay?

Sculpey is a polymer clay most often used for small crafts. Baking is the recommended curing technique, but boiling may work just as well for small projects, preferably with clay pieces no thicker than one inch.

Can you wet polymer clay?

As polymer clay is a waterproof oil based material it can get wet, either in it’s baked or unbaked state. Water can however make the clay a little more brittle, if a design is submerged after baking.

What happens if you burn polymer clay?

In addition to phthalate exposure the research indicates that when polymer clay is overheated enough or accidentally burned, the PVC will break down and release highly toxic hydrochloric acid gas.

What can I use instead of polymer clay?

Natural Cold Porcelain Clay is a perfect substitute for toxic polymer clay and allows for even finer detail and ease of sculpting. It’s also incredibly inexpensive and super simple to make. The clay is air-dried so no need for baking and it dries to a light weight, luminous, stone-like texture.

Can you bake polymer clay in a normal oven?

Yes! You can bake your polymer clay in your home oven. Pros: Your polymer clay is perfectly safe to bake in the same oven you cook your food — just be sure to clean your oven periodically and use good ventilation. As long as you don’t burn your clay, it won’t give off toxic chemicals during its curing.

Can you be allergic to polymer clay?

Some people seem to be allergic to something in the clay. If you do develop a rash, you may wish to contact a physician for personalized advice, but wearing gloves will probably solve the problem.