Cast Iron Tubs, Hopi Kachina Dolls, Mine Truck Engine, Memory Cards

How It's Made – Season 20

Molten iron is cast into heavy bathtubs before the surfaces are cleaned and coated with durable enamel. Cottonwood roots are carved and painted into traditional Hopi Kachina dolls; enormous mine-truck engines are dismantled, inspected, repaired and reassembled; and semiconductor chips are mounted, enclosed and tested to create compact memory cards.