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Look at your packet of clay for a seal with “AP” (Approved Product) in the center. This indicates that the clay has undergone toxicological evaluation by medical experts at the Arts & Crafts Materials Institute (ACMI) in Boston. Further, a toxicological review board has reviewed the findings of the medical experts.
Only after passing these tests can a material bear the label that it conforms to the standard. In the ACMI’s words, the product has been "certified by an authority on toxicology associated with a leading university to contain no materials in sufficient quantities to be toxic or injurious to humans, including children, or to cause acute or chronic health problems, even if ingested."
Furthermore, since 1990 it has been mandatory under federal law that any craft materials bear a hazard label if they are not certified as non-toxic. You will find no hazard label on your box of polymer clay.
If you trust Consumer Reports, you will be pleased to know that their Institute found no adverse effects due to polymer clay even in cases where people or pets had eaten it. However, I don’t recommend that!
Polymer Clay Baking Fumes
Many people are concerned about the "fumes" from baking polymer clay. Clay correctly baked produces a slight smell, as do most things you bake in your oven. Fumes (i.e. gaseous emissions) only result when you burn the clay; so take care not to burn your project (duh!).Polymer clay when burned, releases hydrochloride gas. This gas has no chronic effects, but can irritate the mucous membranes and cause stinging of the eyes, nose, and throat. What to do? Turn off the oven and leave the area until the gas dissipates.
The best thing about polymer clay is that it can be cured in a home oven rather than an expensive kiln. It is perfectly safe to use your oven for food even if you’ve just removed your clay pieces.
Just be sure no crumbs or small clay pieces are left behind; because at higher cooking temperatures, the clay crumbs will burn releasing that irritating hydrochloride gas.
Food and Polymer Clay
The one caution my box of Sculpey III carries reads, “Pottery or dishes made from Sculpey III should be used for decorative purposes only, not with food, beverages or smoking materials.”You might wonder why you can’t put food on a polymer clay plate if polymer clay is non-toxic. The answer has more to do with the food than the polymer clay.
Because polymer clay is porous even after curing, it is difficult to sanitize. Mold spores and bacteria from the food can settle and proliferate in the pores, potentially damaging your clay work and spreading disease.
Polymer Clay Plasticizers
Years ago, dioctyl phthalate was used as a plasticizer. Once it was found to have health risks, it was banned. The phthalates used in polymer clay today are monitored under all of the hazardous materials testing mentioned above.Remember, if it contained materials toxic to humans, polymer clay would be required by federal law to bear a warning label. Again, polymer clay bears no such warning.
Use the product as directed and you should have no problems.
Here are more Home Cured Modeling Clay Articles.
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