这边的床上用品太让人无语了!

回复: 这边的床上用品太让人无语了!

看来你错把“根数”当“支数”了:wdb5::wdb14:完全两个概念
根数是表示密度,美国加拿大都有(经密+纬密)x2的弄虚作假,因为一根线里通常有两根纱加捻纺成。
支数是表示粗细

国内最低档的全棉府绸布40x40,133x72,40代表支数,133代表经密,72代表纬密。
按这里的算法就是(133+72)x2=410,就是Thread count 400 ,就是你所谓的400支。


Thread count is a measure of the coarseness or fineness of fabric. It is measured by counting the number of threads contained in one square inch of fabric or one square centimeter, including both the length (warp) and width (weft) threads. The thread count is the number of threads counted along two sides (up and across) of the square inch, added together.[4] It is used especially in regard to cotton linens such as bed sheets, and has been known to be used in the classification of towels.
Thread count is often used as a measure of fabric quality, so that "standard" cotton thread counts are around 150 while good-quality sheets start at 180 and a count of 200 or higher is considered percale. Some, but not all, of the extremely high thread counts (typically over 500) tend to be misleading as they usually count the individual threads in 'plied' yarns (a yarn that is made by twisting together multiple finer threads). For marketing purposes, a fabric with 250 two-ply yarns in both the vertical and horizontal direction could have the component threads counted to a 1000 thread count although "according to the National Textile Association (NTA), which cites the international standards group ASTM, accepted industry practice is to count each thread as one, even threads spun as two- or three-ply yarn. The Federal Trade Commission in an August 2005 letter to NTA agreed that consumers 'could be deceived or misled' by inflated thread counts.[5] In 2002, ASTM proposed a definition for "thread count" [6] that has been called "the industry's first formal definition for thread count".[7] A minority on the ASTM committee argued for the higher yarn count number obtained by counting each single yarn in a plied yarn and cited as authority the provision relating to woven fabric in the Harmonized Tariff Schedule of the United States, which states each ply should be counted as one using the "average yarn number."[8]
维基的解释:500根以上的基本就是误导
:wdb17: 小和尚应该是学理科的吧,做事总是这么严谨,有理有据:wdb10:不得不佩服啊~~
 

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