Experiment 20: Greensand Casting

This one's a special one - it's extra big and beautiful!  In this experiment, I made a mold of a bowl using greensand, a type of sand used in the metalcasting industry for molding.  Then, I poured a crucible full of molten aluminum into the mold and let it cool.  After breaking the sand, I had an amazing aluminum bowl!  The process was extremely fun and I am pleased with the results.  Check out this experiment in more detail at Instructables: http://www.instructables.com/id/Cast-an-Aluminum-Bowl/