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  2. Cleanliness - Wikipedia

    en.wikipedia.org/wiki/Cleanliness

    Cleanliness. Cleanliness is both the state of being clean and free from germs, dirt, trash, or waste, and the habit of achieving and maintaining that state. Cleanliness is often achieved through cleaning. Culturally, cleanliness is usually a good quality, as indicated by the aphorism: "Cleanliness is next to Godliness ", [1] and may be regarded ...

  3. Cleanness - Wikipedia

    en.wikipedia.org/wiki/Cleanness

    Cleanness (Middle English: Clannesse) is a Middle English alliterative poem written in the late 14th century. Its unknown author, designated the Pearl poet or Gawain poet, also appears, on the basis of dialect and stylistic evidence, to be the author of Sir Gawain and the Green Knight, Pearl, and Patience, and may have also composed St. Erkenwald.

  4. ISO 14644 - Wikipedia

    en.wikipedia.org/wiki/ISO_14644

    ISO 14644. ISO 14644 Standards were first formed from the US Federal Standard 209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones. The need for a single standard for cleanroom classification and testing was long felt. After ANSI and IEST petitioned to ISO for new standards, the first document of ISO 14644 was published ...

  5. Hygiene - Wikipedia

    en.wikipedia.org/wiki/Hygiene

    Washing one's hands, [1] a form of hygiene, is the most effective way to prevent the spread of infectious diseases. Hygiene is a set of practices performed to preserve health. According to the World Health Organization (WHO), "Hygiene refers to conditions and practices that help to maintain health and prevent the spread of diseases." [2]

  6. Laundry symbol - Wikipedia

    en.wikipedia.org/wiki/Laundry_symbol

    The four symbols shown indicate that the garment must not be washed in water, must not be bleached, may be ironed only with a protective pressing cloth, and must be dry cleaned. A laundry symbol, also called a care symbol, is a pictogram indicating the manufacturer's suggestions as to methods of washing, drying, dry-cleaning and ironing clothing.

  7. Cleanroom - Wikipedia

    en.wikipedia.org/wiki/Cleanroom

    The yellow (red-green) lighting is necessary for photolithography, to prevent unwanted exposure of photoresist to light of shorter wavelengths. A cleanroom or clean room is an engineered space that maintains a very low concentration of airborne particulates. It is well isolated, well controlled from contamination, and actively cleansed.

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