The History of Cleanroom Clothing
The history of cleanroom clothing has seen many technological changes over the decades. Early cleanroom concepts of controlling contamination can be traced as far back as the American Civil War, when front-line surgeons noted the environmental risks of surgery in the field. During the 19th century, hospital operating rooms were among the only places using rudimentary cleanroom principles to reduce infection.
Early in the 20th century, with the invention of the gas mask during World War I and the development of HEPA filters, the cleanroom as we know it today began to take shape.
Earliest Cleanroom Clothing Concepts
Hospitals led the way in developing many cleanroom technologies, including the disposable glove. Initially, these were not designed for cleanliness, as Louis Pasteur’s germ theory was still gaining acceptance. Joseph Lister developed a machine that sprayed carbolic acid around surgical sites. Using this along with washing instruments in the same solution reduced surgical patient deaths from nearly 50% to 15% in 1870, leading to rapid adoption in medical facilities.
The use of sterilizing mist set the stage for disposable gloves. Skin-irritating disinfectants caused a nurse to complain about rashes, prompting Dr. William Stewart Halstead in 1889 to contact Goodyear Rubber Company to design the world’s first disposable rubber gloves.
Modern disposable latex gloves, similar to today’s cleanroom gloves, were first manufactured by Ansell in 1965. The first generation of today’s cleanroom was developed in the 1960s at Sandia Corporation by Willis Whitfield. Cleanroom garments evolved to control human-sourced contamination while improving comfort and donning practices.
The 1960s
As biological and chemical industries grew, cleanroom operators needed protection from hazardous compounds. Workers initially wore 100% cotton shirts, pants, and lab coats. Hospitals continued focusing on infection control with similar attire.
The 1960s introduced HEPA filtration and unidirectional airflow (laminar flow), which significantly reduced particle contamination. Cleanroom workers still shed particles until captured by filtration systems.
In 1967, the American Association for Contamination Control (A2C2) published a report on cleanroom garments specifying:
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Clothing must be lint-free (Federal Standard 209)
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Garments must use synthetic fabric with limited linting (US Air Force Technical Order No. 00-25-203)
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Filament Dacron polyester yarn recommended, with:
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Taffeta weaves for frocks, lab coats, caps, boot covers
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Herringbone weaves for coveralls
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Garments were to have no pockets, pleats, dust-collecting ridges, or raw edges. Seams must be double-needled, adjustable neckbands and cuffs provided, and laundering performed in a cleanroom environment.
Cleanroom Sterilization Methods
The 1970s
Nonwoven fabrics emerged, enabling disposable cleanroom apparel. DuPont developed Tyvek, a flash-spun bonded polyolefin material durable against chemicals, liquid splashes, and air-impermeable, suitable for sterilizable pharmaceutical garments.
Other innovations included:
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Cleanroom boots to prevent particle shedding
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Hoods to protect hair and facial hair
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Polyester fabrics with carbon yarns to dissipate static (Kanebo, EV-Guard, Selguard)
The 1980s
The term “cleanroom” gained global recognition. In 1987, the IES absorbed the A2C2 Garments and Laundry Committee and released recommended practices (IES-RP-CC-003) for garment use.
The Helmke Tumble Test became a standard for evaluating garment cleanliness, later revised in 2011 as IEST-RP-CC003.4.
Gore-Tex (PTFE laminate with carbon ESD yarn) and high-density taffeta fabrics emerged for semiconductor, microelectronics, and pharmaceutical industries.
The 1990s
Cleanroom gloves evolved with nitrile disposables, providing chemical resistance and allergy reduction. Other innovations included:
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Burlington Industries’ high-density ESD stripe fabrics
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Precision Fabrics Group’s antimicrobial and Teflon-shielded fabrics
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Gamma irradiation for sterilizing disposable garments
Undergarments shifted from cotton to 100% polyester non-shedding fabrics for ISO Class 3–5 cleanrooms. Flame-resistant Nomex fabrics were introduced for industrial applications.
In 1999, a US patent outlined “Cuffed and Folded Garment Package” to preserve sterility during donning.
The 2000s
By 2000, cleanroom laundry facilities were ISO 9001 certified. In 2003, IEST published IEST-RP-CC003.3, standardizing garment manufacture, cleaning, and testing. Recommendations included high-density ESD fabrics, non-woven materials for disposable garments, and avoidance of silicone to prevent airborne molecular contamination.
Precision laundering, packaging, and quality management systems were emphasized. USP 797 outlined sterile apparel requirements for pharmaceutical cleanrooms.
Reusable vs. Disposable Cleanroom Garments
Dogs in cleanrooms? A US Patent in 2011 introduced the “Canine Cleanroom Suit.”
Since 2010
USP 800, aimed at hazardous drug handling, was proposed in 2010 and finalized in December 2019. Adoption is gradual, but modern cleanroom clothing technology already supports compliance.
Recent advances focus on:
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Garment and packaging design for proper donning/doffing
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Improved productivity and comfort
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Reduced operator errors
The global cleanroom market exceeded $12B in 2019, with 60% electronics/semiconductor and 40% bio/pharma cleanrooms.
The Future of Cleanroom Clothing
Biologics, cell and gene therapy, personalized medicine, and medical device manufacturing are growing rapidly.
Stringent regulations like USP 797 and USP 800 will drive adoption of advanced cleanroom garments, ensuring better protection and compliance.
Let’s Make History Together
Cleanroom apparel has evolved over decades to improve compliance, materials, and comfort. Proper donning and doffing remains critical for safety and contamination control.
Our cleanroom experts guide you in meeting protocols, avoiding compliance issues, and provide free samples for your team.
