00:00The tube slid over the truck's exhaust pipe, trapping the black smoke pouring out of it.
00:05Inside, an electric charge pulled carbon particles from the smoke.
00:09And after 20 days, the cylinder was unscrewed and packed with a fine black powder.
00:15But that powder was loaded with chemicals that caused cancer.
00:18So it was washed in a lab until only black carbon was left.
00:23Then that carbon was ground into a fine dust, mixed with liquid, and loaded into small tubes so artists could
00:30paint with it.
