Can I wear jewelry and makeup in a cleanroom?

In A CleanRoom, strict control of environmental contamination is key to ensuring the accuracy of experimental results and product quality. In this high-cleanliness environment, operators are usually required to follow a series of strict standards. Regarding the issue of wearing jewelry and cosmetics, industry regulations and international standards provide clear guidance.

According to the international standard ISO 14644-1, the classification of modular clean rooms is based on the concentration of particulate matter in the air. In certain grades of cleanrooms (such as ISO5 and higher), the number of particles per cubic meter in the air must be controlled below 3,520 particles (≥0.5 microns). Wearing jewelry may increase the release of particulate matter in the air because dust and microorganisms may accumulate on the surface of the jewelry. In addition, jewelry rubs against the skin when worn and moved, generating tiny particles that further contaminate the environment. Therefore, many Cleanroom operating procedures prohibit the wearing of any form of jewelry, including earrings, necklaces, and bracelets, to reduce potential sources of contamination.

Regarding the use of cosmetics, the standards of the cleanroom industry are also cautious. Cosmetics often contain a variety of ingredients, such as powders, oils, and fragrances, which may release tiny particles or chemicals in a dust-free environment, thus affecting air quality. According to the US Federal Standard 209E, the use of cosmetics is completely prohibited in some cleanrooms, especially in environments with high cleanliness requirements. For example, in cleanrooms in the Pharmaceutical industry, operators are usually required to change their entire body and remove all cosmetics before entering due to strict requirements for product purity.

Although some cleanrooms may have a certain degree of tolerance for the use of cosmetics, allowing the use of products that do not contain particles or fragrances, operators still need to strictly follow the specific regulations of their laboratories. To ensure the cleanliness of the cleanroom, it is recommended that operators conduct a comprehensive inspection before entering the cleanroom and follow the relevant guidance in the international standard ISO 14644.

according to international standards and industry best practices, wearing jewelry and makeup in a cleanroom is not recommended. In order to protect the cleanliness of the environment and the effectiveness of the experiment, operators should follow the regulations of the cleanroom and reduce potential contamination risks through strict self-management. Laboratory managers should regularly train their staff to ensure that all personnel understand and follow these important hygiene standards to maintain the high standards of cleanliness in the cleanroom.