Van Aken Oven-Hardening Polymer Clay – Firm a review by Cara Jane Hayman January 2025 The polymer clay I normally use is Kato Polyclay, which is manufactured by Van Aken, and I  have used it for 95% of my polymer clay projects for the last 15 years. I love its firmness and  the way it handles. I mainly make canes and I get a clean crisp result with much less  distortion than I would with softer clays. I also like its strength and rigidity. I can make very  thin but durable pendants and earrings that aren’t too flexible and keep their shape.  

The new Van Aken Oven-Hardening Polymer Clay Firm feels firm in the packet. Opening the  packet it doesn’t have a strong smell, unlike Kato which has a distinctive smell. Whilst I don’t  especially like the smell of Kato it does help me identify it if ever I am uncertain which type  of clay I have – I found this useful whilst testing these clays as they were all white!

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