|Description:||This 1950 historical photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH), and depicted a Sani-System cleaning unit in a chlorinated hydrocarbon dry-cleaning plant. In the 1950s, the Industrial Hygiene Division (IHD) investigated hazards in dry cleaning environments. New non-flammable cleaners had recently been introduced that created concerns about their toxicity. Modern dry-cleaning machines now employ a “closed system”, whereupon, clothes may be cleaned, and dried in one machine without having to be transferred between two functionally-different machines.|
As of 2005, there were approximately 36,000 dry cleaning businesses in the U.S. with most employing less than ten people. The focus today is on the perchloroethylene, used as a solvent in 85% of dry cleaning shops. It is carcinogenic in animals and suspected to be so in humans.
The NIOSH Historic Photo Collection began as the “picture file” of the Industrial Hygiene Division of the U.S. Public Health Service (USPHS), c. 1930-1960. It is a unique collection of mid-20th Century images of American workers and workplaces and documents occupational safety and health research of that era. The collection consists of approximately 1,000 original photographs and schematic drawings.