Sculpey

The primary ingredient in Sculpey is polyvinyl chloride, augmented with fillers, plasticizers and colorants.

Aside from the hazards of overheating and combustion, which can generate hydrochloric acid and other toxins, Sculpey is nontoxic both before and after hardening.

[1] Sculpey is a brand of polymer clay made by Polyform Products in the United States.

The material was neglected for a period of time, until the late 1960s, when it was discovered that the compound could be molded, baked, sanded, drilled, carved and painted.

The clay was marketed directly to people at craft shows, street fairs and demonstrations in small art stores.