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==== Cotton classification ====
Cotton classification, or classing, is the process of classifying cotton based on its grade, staple length, and micronaire.<ref>{{Cite web |title=Cotton Properties |url=https://www.cottoninc.com/quality-products/nonwovens/cotton-fiber-tech-guide/cotton-properties/ |access-date=2022-04-07 |website=www.cottoninc.com}}</ref> Micronaire is a measure of cotton maturity.<ref>{{Cite web |title=2.2.1-Cotton Value Addition-Micronaire |url=https://www.cottonguide.org/cotton-guide/cotton-value-addition/micronaire/ |access-date=2022-04-07 |website=www.cottonguide.org}}</ref> Maturity of cotton fibers is measured with single fiber measurement test or by double compression air flow test. It is expressed in percentage or maturity ratio.<ref name=":12">{{Cite book |last=Centre |first=International Trade |url=https://books.google.com/books?id=dHL-DwAAQBAJ&q=the+relative+wall+thickness+(i.e.+the+area+of+the+cell+wall+to+that+of+a+circle+with+the+same+perimeter+as+the+fibre,+or+the+ratio+of+the+cell+wall+thickness+to+the+overall+%E2%80%98diameter%E2%80%99+of+the+fibre) |title=Cotton Exporter's Guide |date=2007-12-31 |publisher=United Nations |isbn=978-92-1-361490-7 |language=en}}</ref>
==== Micronaire ====
Cotton's simple Micronaire value is determined by both the fineness of the fibres as well as their maturity.<ref>{{Cite web |title=Micronaire - an overview {{!}} ScienceDirect Topics |url=https://www.sciencedirect.com/topics/engineering/micronaire |access-date=2021-08-29 |website=www.sciencedirect.com}}</ref> Micronaire values or reading represents the fineness of the cotton fiber. For example, a preferred micronaire range is 3.7 to 4.2. [[Gossypium hirsutum|Upland cotton]] is coarser than [[Gossypium barbadense]] (Pima cotton).<ref>{{Cite book |last1=Fang |first1=David D. |url=https://books.google.com/books?id=amDMDwAAQBAJ&dq=micronaire+value+of+cotton&pg=PA708 |title=Cotton |last2=Percy |first2=Richard G. |date=2020-01-22 |publisher=John Wiley & Sons |isbn=978-0-89118-625-0 |pages=708 |language=en}}</ref>
== See also ==
=== Fabric testing ===
Fabric testing includes measurements such as [[Units of textile measurement#Grams per square metre (GSM)|fabric weight]], fabric width, [[Dimensional stability (fabric)|shrinkage]] testing, [[colour fastness|colour fastness to washing]], [[Lightfastness|fastness to light,]] [[Pill (textile)|pilling]], tearing and bursting strength, etc.
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