i'm pretty sure warpig.com did an article on that. i believe paintballs are made kinda like those liquid gel caps things are made. here is one link, although i'm not sure if that's what you're lookin for http://www.paint-ball.org/paintball/paintballs.htm
just a quick question, from the process they tell us what they are made of, but is there any where that tells us if they are flammable or toxic, as this is what the airlines want to know.