1 Scope
This standard specifies the unified type, test methods, samplin,g requirements, packaging, marking and acceptance rules for dehaired cashmere .
This standard is applicable to the assessment of1: deh電red cashmere (natural colour white, brown, g「ey and red cashmere) after dehairing process 'from raw cashmere, as a unified specification for delivery and acceptance .
2 Nornative references
The following referenced documents are indispensable for the.application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.也 ．
GB/T 6500, Test method for moisture rega的 of rf1air fibers-Oven method
GB/T 6529, Textiles-Standard atmospheres for conditioning and testing
GB/T 8170, Rules of rounding o療 for numerical values & expression and judgem entof limiting values
GB 9994, Conventional moisture regains of textile materials
GB/T 10685, Woo1-2oetermination of fiber diameter-Projection mic'ros·cope method
GB/T 16988, Quantitative determination for mixtures qf special animal fibre and wool
FZ/T 20002, Determination of ether extractable matter in wool textiles
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 3.1
cashmere
cashmere fiber with diameter not more than 30 μm, with many crimps and no medulla 3.2
guard hair
fiber with diameter more tha,n 30 μm, with or without medulla and/or crimp,L iocluding atypical
』 E
cashmere fiber
3.3
atypical c!shmere fiber
fiber of which guard hair accounts for more t導ari bne third of the total fiber length, with one end
showing cashmere features and the other en showing guard hair features
3.4
foreign matter
dandruff and/or other foreign matter mixed in cashmere
3.5
col。ured fiber
hair fiber longer than 5 mm and its colour exhibits difference from white cashmere
3.6
crossing length
length corresponding on t甘e cro2sing between fiber length distribution cu刊β and-the vertical axis
4 Technical.req uirements
4.1 Type designati。n
According to natural colour, quality characteristics and considering its different purpose of use, dehaired cashmere (white, brown, grey and red cashmere) is designated into different types, mainly based on mean fiber diameter, mean fiber length and by combining the specifications shown in Table 1 and Table 2.
4.2 Expression of type
