What this page is and isn’t about — It’s about fine art air-dry and polymer clays. It’s not about ceramic, cold porcelain, resin clay, epoxy clays, or any kiln-cured products.
This page was written after reading https://www.reviewstream.com/reviews/?p=155083#thoughts-box, which was about Premier clay, which is an artist grade air-dry clay, and the beginner’s needs and understandable confusion.
For jewelry making, Premo!, Fimo Classic, Kato, and Cernit are some of your better choices of oven-cured polymer clays –they’re durable enough and do not have to be sealed unless certain surface treatments (mica powders like Pearl Ex or Perfect Pearls…) require it. See: https://thebluebottletree.com/seal-polymer-clay/
Durability… While people making charms often use various air-dry clays, they usually don’t construct bracelets or rings out of air-dry clays. Jewelry may take much more wear and tear.
Seal it or not? As a rule, air-dry clays generally have to be sealed once dry and finished but oven-cured polymer clays don’t. (Two-part epoxy clays don’t have to be sealed but although they’re often called air-dry, they actually cure by chemical reaction and may even be able to cure under water. They’re not true air-dry clays.)
Cracks in Premier clay.… Cracks don’t mean your air-dry clay is weak. Premier is one of the strongest air-dry clays. Nearly all air-dry clays have some shrinkage and Premier is no exception, although it shrinks less than some air-dry clays. Having a good armature, if armature is necessary, and using minimal amounts of water while sculpting with Premier can decrease the likelihood or severity of cracks. Sometimes cracks happen but they’re easily be repaired with Premier, even if your item dried. See the below video. Cracks may occur if you added too much water while sculpting, used a cardboard armature, used thin clay over a rigid armature (Ostrich legs, for example), let your item dry too quickly, or didn’t support sculpture parts subject to gravity. Don’t dry your Premier clay items under a fan, for example. Do remember to keep unused clay in an air-tight bag and/or container.
For figurative works, Premix, an air-dry clay made by the same company as Premier, is easier to sculpt and blend than Premier. Doll artist Hannie Sarris loved Premix clay. Premier clay may take some different sculpting techniques than what one would be used to with polymer clay and one uses minimal (!) amounts of water are used while sculpting Premier. People working with these air-dry clays might lightly dab their fingers across a wet sponge to keep clay moist enough while sculpting. They may use a mister type of water bottle. Do not use Sculpey Clay Softener or any type of oil to soften, smooth, and blend these air-dry clays — they are hybrid clays and have their own characteristics, sculpting techniques, storage and compatibility considerations. They’re not like the majority of polymer clays that are oven-cured (e.g., Fimo Classic, Fimo Soft, Cernit, Fimo Doll, Premo!). They’re not like most air-dry clays on the market. They are used by a number of very famous art doll artists and others.
So yes, there are indeed air-dry polymer clays — Activa Lumina Translucent Polymer Clay, Staedtler Fimo Air Basic Modeling Clay, and Activa LaDoll Premier clay are examples of air-dry polymer clays. Activa, the company that makes laDoll Premier clay, describes Premier clay as a type of polymer clay on their site. Lumina has long been known to the polymer clay community. Fimo Air Basic is weaker than either of those.
Polymer clays have their own issues — Dirt, lint, hair, compatibility issues, and baking considerations (always monitor your oven with two oven thermometers, not counting the oven’s own temperature reading). If you look at it that way, a few easily repaired cracks in Premier clay items isn’ts a bad deal.
Sculpey Diluent, AKA liquid Sculpey Clay Softener, works with oven-cured polymer clays, specifically, and not with air-dry polymer clays. Here’s the Sculpey Clay Softener Material Safety Data Sheet: https://www.sculpey.com/wp-content/uploads/2015/12/Clay-Softener-SDS-10282015.pdf
In contrast, Makin’s, Hearty, Das, “cold porcelain” clays, Creative Paperclay, Celluclay, and epoxy putties are not polymer clays no matter who describes them as such.
For a whole lot of information on all things polymer and air-dry clay, see:
- http://www.glassattic.com/ — About polymer clay … it’s like an encyclopedia
- http://www.garieinternational.com.sg/clay/shop/tension_test.htm — Which polymer clay is strongest?
https://thebluebottletree.com/ — Lots of definitive polymer clay articles and fantastic tutorials
- http://www.polymerclayweb.com/ — About polymer clay, has some tutorials
- http://www.garieinternational.com.sg/clay/clay.htm — Polymer clay 101 for beginners, the quick run through of brands
http://www.jaedworks.com/clayspot/polyclay-faq/basics.html — Information page about clays, written a while ago I think but still very relevant
Individual Dick Blick clay description pages —
- https://cdn.shopify.com/s/files/1/0276/9565/files/air_dry_clay_differences.pdf?1927224553175816568 — Specific to the differences between Activa’s Premier, Premix, and Satin Smooth clays
- https://youtu.be/JrIGZZXiPpo — a video about air dry clays, cardboard armature, drying too quickly, cracking, and how to fix the crack(s)
- https://karenascofield.wordpress.com/2015/08/31/strongest-air-dry-clay-for-sculpting-art-dolls/ — My other page on Premier Clay
- http://airdryclay.blogspot.com/p/adc-brands.html — a nice list of air-dry clays, just to give you an idea about such things
…Or go to clay manufacturers’ sites and hit their FAQs and MSDS pages. I wish there were sculpting, storage, compatibility, MSDS and other information (to seal or not to seal) with each clay package that one takes home, but that’s sadly not the case.