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  2. Respirator fit test - Wikipedia

    en.wikipedia.org/wiki/Respirator_fit_test

    The main advantage of qualitative fit test methods is the low cost of equipment, while their main drawback is their modest precision, and that they cannot be used to test tight-fitting respirators that are intended for use in atmospheres that exceed 10 PEL (due to the low sensitivity). To reduce the risk of choosing a respirator with poor fit ...

  3. Hair removal - Wikipedia

    en.wikipedia.org/wiki/Hair_removal

    Militaries may also require men to maintain clean-shaven faces as facial hair can prevent an air-tight seal between the face and military gas masks or other respiratory equipment, such as a pilot's oxygen mask, or full-face diving mask. [41] The process of testing whether a mask adequately fits the face is known as a "respirator fit test".

  4. Andre Walker Hair Typing System - Wikipedia

    en.wikipedia.org/wiki/Andre_Walker_Hair_Typing...

    The Andre Walker Hair Typing System, also known as The Hair Chart, is a classification system for hair types created in the 1990s by Oprah Winfrey's stylist Andre Walker. [ 1 ] [ 2 ] [ 3 ] It was originally created to market Walker's line of hair care products but has since been widely adopted as a hair type classification system .

  5. Hair Type Chart: Determine Your Hair Type for Healthy Strands

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  6. Hair type chart: How to find your hair type, from straight 1A ...

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    The original hair type chart, also known as the hair typing system, was created by Andre Walker, Oprah Winfrey's hairstylist, in the 1990s. He debuted the system on Winfrey's show to promote his ...

  7. 21 Charts You'll Appreciate If You Have No Idea How To Do ...

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  8. List of facial hairstyles - Wikipedia

    en.wikipedia.org/wiki/List_of_facial_hairstyles

    Facial hair growing from the chin directly beneath the mouth. This is meant to resemble the hair on the chin of a goat. Also called a "chin puff" or "chin strip". [7] Soul patch: A soul patch is grown just below the lower lip, but does not grow past the chin (i.e., goat patch). This facial hairstyle is often grown narrow and sometimes made into ...

  9. Fitzpatrick scale - Wikipedia

    en.wikipedia.org/wiki/Fitzpatrick_scale

    The Fitzpatrick scale (also Fitzpatrick skin typing test; or Fitzpatrick phototyping scale) is a numerical classification schema for human skin color. It was developed in 1975 by American dermatologist Thomas B. Fitzpatrick as a way to estimate the response of different types of skin to ultraviolet (UV) light. [ 2 ]