GB/T 12412-2024 Yak
1 Scope
This document specifies the product classification, technical requirements, sampling, inspection rules, packaging, marking, storage and transportation of yak wool and describes the corresponding test methods.
This document applies to the production, trading, processing and quality assessment of yak wool.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2910 (all parts) Textiles - Quantitative chemical analysis
GB/T 5706 Textiles - Wool textile products - Terminology
GB/T 6500 Test method for moisture regain of hair fibers - Oven method
GB/T 6977 Test method for ethanol extractives, ash, vegetable matter, total ali-insoluble impurities in scoured wool
GB/T 10685 Wool - Determination of fiber diameter - Projection microscope method
GB/T 11951 Natural fibres - Terminology
GB/T 16988 Quantitative determination for mixtures of special animal fibre and wool
GB 18267 Cashmere
GB/T 21030 Test method for the mean and distribution of fibre diameter of wool and other animal fibre - Optical fibre diameter analyser (OFDA)
GB/T 35936 Yak hair
GB/T 40826 Test method for hand-arranging staple length of dehaired cashmere - Flatbed scanner method
GB/T 40905.1 Textiles - Quantitative analysis of cashmere, wool, other specialty animal fibres and their blends - Part 1: Light microscopy method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5706, GB/T 11951, GB 18267 and GB/T 35936, as well as the following, apply.
3.1
yak wool
fibres with a diameter of 35μm or less obtained from yak wool
Note: Yak raw material and carded yak wool are collectively referred to as yak wool.
3.2
yak hair
fibres with a diameter of 35μm or more obtained from a yak, with the portion of such a fibre with that diameter exceeding 1/2 of the total length of the fibre
3.3
yak raw material
unprocessed blend fibres obtained from a yak, mainly composed of fluff with natural impurities
3.4
carded yak wool
yak wool obtained through scouring and industrial dehairing processes to remove yak hair
3.5
tag-locks
compact masses each with an area of 25cm2 or more, difficult to be torn apart, formed by wool, hair and impurities irregularly intertwined with each other
3.6
hair content
proportion of mass of the yak hair fibres remaining in carded yak wool after dehairing, expressed as a percentage in the total mass of carded yak wool
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
5.1 Yak raw material
5.2 Carded yak wool
6 Test methods
6.1 Yak raw material
6.2 Carded yak wool
7 Inspection rules
7.1 Type of inspection
7.2 Requirements for inspection lots
7.3 Inspection items
7.4 Judgment rules
8 Inspection certificate
9 Packaging, marking, transportation and storage
9.1 Packaging
9.2 Marking
9.3 Transportation
9.4 Storage
