alt Hacker NewsDoes the ball need to be iron? Can we just take a 3d printed sphere, paint it with glue ,roll it around in a bucket of rust and then smash?
Does the ball need to be iron? Can we just take a 3d printed sphere, paint it with glue ,roll it around in a bucket of rust and then smash?
I would guess you need something rigid and dense to generate enough pressure, though I don’t know if that rules out your suggestion. It does not have to be a ball.