1 Scope: This standard specifies the requirements, inspection rules, packaging, and labeling for the twisted silk of mulberry silkworms. This standard is applicable to singed double stranded mulberry silk. 2. The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication of this standard, all versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 8694-88 Indication of Twist Direction for Textile Yarns and Related Products GB9994-88 Common Moisture regain for Textile Materials FZ/T40003-1997 Test Method for Silkworm Silk 3 Requirement 3.1 Silkworm Silk Fineness, Expressed in Metric Yarns, abbreviated as Metric Yarns, Symbol N_ The length of 1 gram of silk, expressed in meters, when the moisture regain of mulberry silk is determined. For example, when determining the moisture regain rate of mulberry silk, it weighs 1 gram and is 1 meter in length, which is 1 common branch. When it is 2 meters in length, it is 2 common branches. For the fineness of mulberry silk, if it needs to be expressed in decitex, it can be expressed in parentheses after the metric branch. Fentex, abbreviated as Fentex, is a numerical value expressed in grams of the weight of a 10000 meter long silk thread at a common moisture regain. For example, when determining the moisture regain, if the weight of the 10000 meter long silk is 1 gram, it is 1 decibel, and if it weighs 2 grams, it is 2 decibels

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