What (who) is Poolay-hair - definition
Damn! How long have I been walking around with the poolay-hair? All morning, lucky you!
![A [[woman]] dyeing her [[hair]].](https://commons.wikimedia.org/wiki/Special:FilePath/Hårfärgning - 2007.jpg?width=200 "A [[woman]] dyeing her [[hair]].")
![Lafayette]] in 1830, aged 73, with pitch-black hair (painting by [[Louise-Adéone Drölling]]).](https://commons.wikimedia.org/wiki/Special:FilePath/Louise-Adéone Drolling dite Madame Joubert - Portrait du général de Lafayette dans le parc du château de La Grange-Bléneau.jpg?width=200 "Lafayette]] in 1830, aged 73, with pitch-black hair (painting by [[Louise-Adéone Drölling]]).")
![Actress [[Margot Robbie]] with bleached blond hair](https://commons.wikimedia.org/wiki/Special:FilePath/SDCC 2015 - Viola Davis, David Ayer & Margot Robbie (19522425899) (cropped).jpg?width=200 "Actress [[Margot Robbie]] with bleached blond hair")
 in a hairdresser shop in Germany (2023).jpg?width=200 "Shelf with a great number of different hair colours, each having a colour code printed on the packaging, at a hairdresser in Germany")
![Long male hair in Western youth culture became popular in the 1960s and 70s with [[the Beatles]].](https://commons.wikimedia.org/wiki/Special:FilePath/Aankomst Beatles op Schiphol, de Beatles tijdens persconferentie John Lennon, Bestanddeelnr 916-5131.jpg?width=200 "Long male hair in Western youth culture became popular in the 1960s and 70s with [[the Beatles]].")
![[[Bob Marley]] made [[rastafari]] culture and [[dreadlocks]] popular also outside [[Jamaica]].](https://commons.wikimedia.org/wiki/Special:FilePath/Bob-Marley-in-Concert Zurich 05-30-80.jpg?width=200 "[[Bob Marley]] made [[rastafari]] culture and [[dreadlocks]] popular also outside [[Jamaica]].")
![Roman]] marble colossal head of a long-haired [[Zeus]], 2nd century AD.](https://commons.wikimedia.org/wiki/Special:FilePath/Bust of Zeus.jpg?width=200 "Roman]] marble colossal head of a long-haired [[Zeus]], 2nd century AD.")
![Charles I]] with long, natural hair, by Daniel Mytens c. 1631.](https://commons.wikimedia.org/wiki/Special:FilePath/Charles I by Daniel Mytens.jpg?width=200 "Charles I]] with long, natural hair, by Daniel Mytens c. 1631.")
![[[Empress Elisabeth of Austria]] wearing thigh-length hair in 1865. (Painting by [[Franz Xaver Winterhalter]])](https://commons.wikimedia.org/wiki/Special:FilePath/Empress Elisabeth of Austria.jpg?width=200 "[[Empress Elisabeth of Austria]] wearing thigh-length hair in 1865. (Painting by [[Franz Xaver Winterhalter]])")
![Somali]] woman with shoulder-length hair.](https://commons.wikimedia.org/wiki/Special:FilePath/Halimaahmed2.jpg?width=200 "Somali]] woman with shoulder-length hair.")
![[[Transjordanian]] [[Bedouin]] with shoulder length hair, during [[World War II]]](https://commons.wikimedia.org/wiki/Special:FilePath/Rebabah.jpg?width=200 "[[Transjordanian]] [[Bedouin]] with shoulder length hair, during [[World War II]]")
.jpg?width=200 "A man with shoulder length hair, 1659")
![Yakama]] boy with ''mid-back level'' hair. (Photo by [[Edward S. Curtis]], 1868–1952.)](https://commons.wikimedia.org/wiki/Special:FilePath/Yakima boy.png?width=200 "Yakama]] boy with ''mid-back level'' hair. (Photo by [[Edward S. Curtis]], 1868–1952.)")
![Finnish cello player [[Perttu Kivilaakso]] with mid-back length hair](https://commons.wikimedia.org/wiki/Special:FilePath/Apocalyptica Drive With Full Force 2018 20.jpg?width=200 "Finnish cello player [[Perttu Kivilaakso]] with mid-back length hair")
 (cropped).jpg?width=200 "A Japanese woman with mid-back length hair")
![An Italian woman with waist-length hair](https://commons.wikimedia.org/wiki/Special:FilePath/" 12 - ITALY - FIAT - Girls at Bologna Motorshow 2012 01 (cropped).jpg?width=200 "An Italian woman with waist-length hair")
![Opera singer [[Mary Garden]] in 1908 with knee-length hair](https://commons.wikimedia.org/wiki/Special:FilePath/Mary_Garden_in_Debussy%27s_Pell%C3%A9as_et_M%C3%A9lisande_2.jpg?width=200 "Opera singer [[Mary Garden]] in 1908 with knee-length hair")
![Japanese woman combing her long hair. (Colour woodblock print from 1920 by [[Hashiguchi Goyō]].)](https://commons.wikimedia.org/wiki/Special:FilePath/Goyo Kamisuki.jpg?width=200 "Japanese woman combing her long hair. (Colour woodblock print from 1920 by [[Hashiguchi Goyō]].)")
![Illustration of ''[[The Tale of Genji]]'', painted by [[Tosa Mitsuoki]] (1617–1691).](https://commons.wikimedia.org/wiki/Special:FilePath/Ch5 wakamurasaki2.jpg?width=200 "Illustration of ''[[The Tale of Genji]]'', painted by [[Tosa Mitsuoki]] (1617–1691).")
![Nosu]] girls in China 1922.](https://commons.wikimedia.org/wiki/Special:FilePath/Nosu girls.jpg?width=200 "Nosu]] girls in China 1922.")
![A Hindu "[[fakir]]" or [[sadhu]] with long hair. Lithograph 1844 by [[Emily Eden]] after [[Lowes Cato Dickinson]].](https://commons.wikimedia.org/wiki/Special:FilePath/A hindoo fakeer with long hair.jpg?width=200 "A Hindu \"[[fakir]]\" or [[sadhu]] with long hair. Lithograph 1844 by [[Emily Eden]] after [[Lowes Cato Dickinson]].")
Wikipedia
Hair analysis may refer to the chemical analysis of a hair sample, but can also refer to microscopic analysis or comparison. Chemical hair analysis may be considered for retrospective purposes when blood and urine are no longer expected to contain a particular contaminant, typically three months or less.
Its most widely accepted use is in the fields of forensic toxicology and, increasingly, environmental toxicology. Several alternative medicine fields also use various hair analyses for environmental toxicology, but these uses are controversial, evolving, and not standardized.
Microscopic hair analysis has traditionally been used in forensics as well. Analysts examine a number of different characteristics of hairs under a microscope, usually comparing hair taken from a crime scene and hair taken from a suspect. It is still acknowledged as a useful technique for confirming that hairs do not match. But DNA testing of evidence has overturned many convictions that relied on hair analysis. Since 2012, the Department of Justice has conducted a study of cases in which hair analysis testimony was given by its agents, and found that a high proportion of testimony could not be supported by the state of science of hair analysis.
