Where can I find colored styrofoam?
I'm trying to make my own plastic using acetone and styrofoam; however I would like to create colors other than white. Is there anywhere I can find black styrofoam, or any other color besides white? Also, if anyone knows a method for creating colored plastic using the traditional white styrofoam, and some other ingredient(s) that would be great as well.
Edit: Meat trays/plates come in colored varieties; where can I find these?