Resin Science?

[sagejupiter]

I was originally going to post this in the resin yellowing thread, but I figured it was off topic enough to warrant its own thread.

I know that information on general resin formulas can be found on the 'net, but it would be nice to have the more tech-ey information specific to abjds.

i.e. Chemical composition of urethane resins vs. French resin.
Origin of "tree sap" used in the making of resin, if this is the case at all.
Common sources of abjd quality resin (manufacturers-US and Worldwide)
How asian doll company resins compare to casting resins readily available in the states...

If this is already somewhere out there, sorry to bug folks, its just kind of hard to dig up the cut and dry chemical properties/processes and why it becomes difficult to work with in moisture, and other information that I want to find SPECIFIC to abjds.

:sweat

[VinylFaerie]

Strangely enough, a taxidermy forum is a great places to ask questions like these. You'll often find they have an entire area for casting resin (& silicone molds) on their forums and they are very helpful. I use This One (http://www.taxidermy.net/forum/index.php).