They’re not the same thing, but as you can see, it’s easy to confuse them. On the left is plasticine and the right is polymer clay. Both these clay multi-packs are made by Van Aken International. Here you’ll see multi-packs by VanAken International of plasticine and polymer clay. To make matters even worse, sometimes polymer clay and modeling clay come in packages that look almost the same. If you were totally new to polymer clay and didn’t yet know the brands, how would you know which of those brightly colored clays were polymer and which were plasticine? They’re right next to each other and sort of intermingled. Here’s the clay display at my local craft store. But you’d be amazed at how easy this mistake is to make. Store Displaysīut how could you make this mistake at the store? Isn’t polymer clay labeled? Yes, it is. At room temperature, polymer clay and plasticine feel very much the same. If you set a block of polymer clay or plasticine in front of someone who had never worked with either, they’d be hard-pressed to know which they were holding. And, of course, plasticine is the modeling clay that we all learned to use as children in primary school.
It’s also used as a “first” sculpture when making lost wax or other multi-stage casting techniques. Plasticine is often used in the animation industry for stop-motion animation (claymation). Both polymer clay and plasticine are used for sculpting, but only polymer clay can be hardened to create lasting objects. They both soften with the heat of your hands and get softer and smoother as you work with them. They’re both brightly colored blocks of putty that feel sort of waxy and oily when you squeeze them in your hand. Polymer clay and plasticine feel very similar. It is hardest at room temperature and never becomes solid. Plasticine is a modeling clay made from wax, pigments, fillers (like kaolin), and a lot of oils.
Heat makes polymer clay turn into a solid. Polymer clay doesn’t melt or get runny the way that wax or oil does. It gets slightly softer as it warms up but begins to solidify and harden when it reaches about 130☏ (55☌). Polymer clay is an oven-hardening art clay made from PVC (vinyl), plasticizer, pigments, fillers (like kaolin) and a touch of oils.
They’re very different types of clay! Polymer Clay vs. Other times it happens because you get some clay from someone else and assume it was polymer clay, but it was actually plasticine. Sometimes this happens because you pick up a bar of modeling clay along with your polymer clay. And you might be surprised to know that this is a very common mistake. If your clay melted in the oven, it was a type of modeling clay, also known as plasticine or plastalina. Well, it’s easy to assume that the problem is your polymer clay melted. Was the clay old? Was the oven incorrect? Is it normal for polymer clay to melt? Should you bake longer? What happened to cause the melted polymer clay in your baking tray? Polymer Clay Melted – Not. But you know there’s some Sculpey and Premo in there. You’re not really sure because you bought your clay based on the pretty colors, not the brand. You’ve asked online and everyone starts talking about the oven temperature. You set the timer and come back to find that your creations have melted, cracked, drooped, and/or oozed oil. You’re fairly new to polymer clay and loving it! You’ve carefully sculpted and created some beautiful creatures and set them into the oven to bake.
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