This is from a model kit that makes this polyvinyl chloride molecular sculpture, but I forgot where it is located, when I remember I'll add it to the picture as a link. 

Glossary:

Cure: To heat set raw clay. It can be baked or boiled. It can be heat set in the kitchen oven, in a toaster oven or a covered electric skillet. It can be heat cured on your sunny window sill or the trunk of your car. I don't use the word "Fired" for that's for earth clay and it's a gazillion degrees. We cure at the low temperature of 265F/130C and it can be done in more ways than "baking". 

Mini Clay FAQ

It came to my attention that some folks don't know what polymer clay is and how it differs from "earth clay" or "painted plaster".  Having had experience with all three I'll give a 10 point  explanation of the differences and why polymer clay is just so danged handy. 

Polymer clay is cheap, cures quick with no fancy equipment needed and is easy to manipulate because it doesn't set up on you before you're finished or dry out while you're still needing flexibility. 

Carve and the color is still there. 

There's been some concern on the safety of any PVC product. I think that using PVC for baby pacifiers is criminal. Roll up a plastic grocery bag and stick it in your baby's mouth, I think not. 

Polymer clay is to be used with care with adults as well as under supervision with children. The tool that touches polymer clay cannot be reintroduced into the kitchen for food use. Do not make bongs or pipes from polymer clay, like rolling your smoking material in that plastic grocery bag, just not safe to do. Common sense people, use common sense. Just as you would not stir your coffee with a paintbrush used for acrylic paints, don't put polymer clay into your mouth, wear gloves while working on it if you're skittish, wash your hands. It's easy to be careful. 

Ok, what the heck is polymer clay? We kick this term around and what do we really know about it? This page will give you links to the propeller heads who will give you some "hard data".

Polymer Clay is a plastic. Because of that it should not be used for anything that is going into the mouth. No kazoos, no flutes or dishes that hold food. Don't burn it and if you do open all the windows and don't inhale.

Now before you go running into the woods all scared about using a plastic as an art medium, just remember the young apprentice artists, the "Mullers" whose job it was to mix paint pigment into the medium - linseed oil and stuff like that. Those young Mullers died at the same rate as Chimney Sweeps. Sculptors of marble deal with dust. All artists run some risk with the mediums they choose to create their art.

Know what you're working with and work wisely. Don't let friends or family go gnawing on your polymer clay covered pen while they are on hold ordering pizza over the phone. Give them a smack and say "don't do that!"  

Safety (MSDS) data for polyvinyl chloride Some folks say there's no danger if you minimize contact.

Greenpeace has nothing good to say about polyvinyl chloride.

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