Asbestos has been used in the manufacturing industry as a heat-shielding agent. It surrounded machining centers to protect stray workers in the vicinity. It was used in the construction of rooms and labs where machinists worked–in ceiling, wall and floor tiles as a heat-dampening and fire-prevention agent. And, it was used in protective gear, such as aprons and gloves, worn by machinists to protect themselves from electrical shocks, cuts and abrasions.
When protective gear was damaged in the machining process, or when floor, wall and ceiling tiles were removed or replaced, the asbestos dust hung in the air for all workers in the vicinity to breathe in or to take home on their clothing for other friends or family members to inhale.