Question: What exact material are paintball shell's generally made of? I need to write a paper for my materials class and I want to do a little research on prolonging the shelf life of a paintball. I know that a large problem is that they absorb water and swell. I propose that there could be some coating put on the paintball that would prevent this or at least delay it, giving paintballs a longer shelf life. My biggest concern is environmental impact. Can't use plastic shelled paintballs because the plastic isn't biodegradable. Or at least I think it isn't.

Anyway, I was just looking for some material data so I can get started on this. Hopefully someone here knows, or at least knows who I can go ask (Manike).

If you're really intersted I can post the results of my paper after it's finished in a few weeks.