Re:

Matt wrote:

My guess, from the color mainly, is urethane. Lots of automobile body parts
are cast (or molded) from urethane and are yellow underneath the paint. It's
a fairly stiff, rubbery plastic.

Well, I have used a lot of this, but they are like foam. This was solid, no
air bubles at all. And when I said like "hard rubber" - I really meant hard.

I tried to burn it, but it wouldn't. ( reason - I remember you could tell
some apart this way, and the smell and type of flame would tell a lot ) I
can't recall what it smelled.

But it had filled out the mold very nice, and as I can recall it - it was
solid. Why I wondered, is that it looked like a perfect material to make a
lot of stuff from. Stupid I don't have a part here. I had some in storage
there, because I had no idea I would end up here.

I have seen another thing that reminded me a bit of this. This was used to
make forms for "wax" parts. The wax parts - was used to make molds for bronse
figures, silver and such things. They soldered the wax part to a "tree" with
the stem, or trunk, as the main entry for the molten bronse. By that time the
wax had been melted out from these new ceramic molds.

//ARNE