Some standard content:
GB18267-2000
All technical contents of this standard are mandatory. In order to meet the needs of cashmere production, trading, processing, quality supervision and import and export inspection, safeguard the interests of producers, operators and users, this standard is formulated based on the characteristics of cashmere and the actual production and circulation of cashmere in my country by combining reasonable classification and grading with inspection and realistic stereotyping, and subjective inspection with objective inspection. This standard is applicable to raw cashmere, combed cashmere, wheeled cashmere and washed cashmere. From the date of implementation of this standard, the original GB/T13830--1992 "Raw Cashmere of Goat" shall be invalid. This standard is proposed and managed by China Fiber Inspection Bureau. Drafting units of this standard: Jilin Agricultural University: China Fiber Inspection Bureau, General Station of Animal Husbandry and Veterinary of the Ministry of Agriculture, China Animal Products Circulation Association, Inner Mongolia Ordos Cashmere Group Co., Ltd., Beijing Xuelian Cashmere Co., Ltd., Inner Mongolia Luwang Cashmere Nest Group Co., Ltd., Beijing Exit-Entry Inspection and Quarantine Bureau, Inner Mongolia Autonomous Region Fiber Inspection Bureau. The main drafters of this standard are: Ma Ning, Du Shuying, Zhan Lin, Wang Xuanling, Zhang Rongna, Yang Guifen, Qiu Ruiqing. 178
National Standard of the People's Republic of China
Cashmere
GB. 18267--2000
This standard specifies the classification and grading methods, technical indicators, test methods, inspection regulations and inspection certificates, packaging, marking, storage and transportation requirements for cashmere (including raw cashmere, combed cashmere, wheeled cashmere and washed cashmere). This standard is applicable to cashmere production, trading, processing quality supervision and quality identification in import and export inspection. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2910-1997 Methods for quantitative chemical analysis of two-component fiber blends of textiles GB/T 2911-1997
GB/T 4711--1984
Methods for quantitative chemical analysis of three-component fiber blends of textiles Test method for breaking strength and elongation of single wool fiber GB/T 6500-1986
Test method for moisture regain of wool-Oven method
GB/T 6977--1986
GB/T 8170--1987
Test method for oil, ash and foreign matter content of clean wool-Rounding rules for numerical values
Test method for diameter of wool fiber-Projection microscope method GB/T 10685-1989
GB/T14593--1993
GB/T 16988--1997
3 Definitions
Quantitative analysis method for cashmere, sheep wool and mixed fibers Determination of the content of wool in mixtures of special animal fibers and shrunken wool This standard adopts the following definitions.
3.1 Cashmere
Goat raw cashmere, cashmere wool from a sack, clean cashmere wool and combed cashmere wool are collectively referred to as cashmere wool. The cashmere wool with a diameter of 25um or less is cashmere fiber.
3.2 Raw cashmere
Unprocessed cashmere fiber obtained from a sheep with a double-layer wool coat, mainly composed of the lower layer of wool with a small amount of natural impurities.
3.3 Openned cashmere Cashmere Cashmere from goats that have been sorted and shoveled by a dust remover. 3.4 Scoured cashmere Cashmere from goats that have been washed to meet certain quality requirements. 3.5 Dehaired cashmere Cashmere that has been washed and industrially combed. 3.6 Oat hair
Approved by the State Administration of Quality and Technical Supervision in 2000-1205, implemented in 2001~72-01
GB18267-2000
Fluffy fibers collected from goats with a diameter greater than 25m. 3.7 Colour fibre
Fluffy fibers with a different colour from white cashmere. 3.8 Non-animal fibre in cashmerePlant fibre, chemical fibre, etc. contained in cashmere. 3.9 Other animal fibre in cashmereFibres from animals other than goats.
3.10 Content of cashmereThe mass of cashmere from which impurities such as hair, dander, sand, sugar and so on are removed by physical methodsThe percentage of the mass of the original cashmere of old sheep. 3.11 Scoured cashmere content The percentage of the public mass of goat cashmere and cashmere after washing to the mass of goat cashmere and cashmere after washing, drying and removal of coarse hair and impurities. The percentage of the mass corrected by the public moisture regain and public oil content to the mass of goat cashmere and cashmere after washing. 3.13 Scoured cashmere corrected mass The mass of goat cashmere, cashmere and cashmere after the net cashmere content is converted. 3.14 Goat hair content The percentage of the mass of fibers with a diameter greater than 25 pairs in combed cashmere to the total mass. 3.15 Pure cashmere
Cashmere contains cashmere fibers with morphological variations (content not exceeding 5%) but does not contain non-animal fibers and other animal fibers, and can be regarded as all cashmere or 100% cashmere. 3.16 Short cashmere content The percentage of the total number of cashmere fibers with a length of 15mm or less. 3.17 Defective cashmere Abnormal cashmere, mainly including: raw hide cashmere, cooked hide cashmere, dry-retarded cashmere, gray-retarded cashmere, scabby cashmere, moth-eaten cashmere and altered cashmere. 3.18 Peltry cashmere
Goat cashmere obtained from unprocessed goat skin. 3.19 Cooking pelt cashmere Goat cashmere obtained from processed goat skin. 3.20 Dry cancel cashmere Goat cashmere obtained from goat skin by chemical method. 3.21 Lemi cancel cashmere Goat cashmere obtained by soaking goat skin in lime water. 3.22 Acariasis cashmere Goat cashmere with scabies and dandruff obtained from goats with scabies. 3.23 Moth-eaten cashmere Cashmere that has been shortened by frogs and insects. 3.24 Mildew cashmere
Cashmere that has been heated and deteriorated after being exposed to moisture, and its performance characteristics are that the fiber becomes moldy and yellow, the strength is low, and the luster is dull. 4 Product classification
4.1 Cashmere is divided into white, cream and purple cashmere according to its natural color, which are represented by W, G and B respectively. 4.2I Cashmere color classification regulations are shown in Table 1.
Color categorybZxz.net
White cashmere
Blue cashmere
Purple cashmere
GB 18267—2000
Table 1 Cashmere color classification regulations
Appearance characteristics
Cashmere fiber and wool fiber are both white
Cashmere fiber is grayish white or blue, wool fiber is black, white or brownCashmere fiber is purple or brown, wool fiber is brown or black4.3 Cashmere of different color categories is mixed and classified according to the darker color. Part I Raw cashmere
5 Technical conditions
5.1 The technical conditions for the model and grade of raw cashmere are shown in Table 2. Average diameter and hand-pulled length are the assessment indicators, and quality characteristics are reference indicators. Table 2 Technical conditions for the model and grade of raw goat cashmere
Extra fine type
Average diameter
Hand-pulled length
Quality characteristics
Natural color, bright and soft luster, smooth and delicate touch. The fiber has good strength and elasticity, and contains a small amount of easily detached skin debris
Natural color, bright luster, soft touch. The fiber has good strength and elasticity, and contains a small amount of easily detached skin debris
Natural color, good luster, and good touch. The fiber is elastic, has good strength, and contains a small amount of easily detached skin debris
5.2 The quality of goat cashmere is calculated based on the net cashmere rate, and can also be calculated using the cashmere content rate. 5.3 Raw hide cashmere, cooked hide cashmere, dry cashmere and gray cashmere in defective cashmere must be separated and packaged separately. Scabies cashmere, insect-eaten cashmere, mildewed cashmere and the like must be removed and not mixed in.
5.4 The moisture regain of goat cashmere shall not be greater than 13%. 6 Test method
6.1 Instruments and appliances
a) Eight-basket oven;
b) Balance (division value: 1g, 0.1g, 0.01g0.0001g); c) Scale (division value: 0.1kg, 0.01kg, 0.001kg); d) Washing equipment;
e) Steel ruler (division value 1mm).
6.2 Sample preparation
6.2.1 Batch sample
6.2.1.1 Sampling quantity: 20 packages or less are sampled one by one, and the additional part above 20 packages is sampled at 30%, and less than one package is counted as one package. 50kg of unpackaged products are counted as one package. The total weight of the sample is not less than 3kg. 6.2.1.2 Sampling method: The sample is randomly sampled from the middle of the sample package and another random part 15cm or more deeper than the foreskin by opening the package. The sample is divided into two parts, A and B. Part A is used to evaluate the hand-pulled length, fiber type, specification, quality characteristics and defective down, and the total weight of the sample is not less than 1kg. Part B is used for the cleaning rate, net down rate, down content rate and average diameter test, and the total weight of the sample is not less than 181
GB 18267-2000
2kg. After the B part of the batch sample is extracted, it should be quickly placed in a sealed container and weighed within 4 hours, which is called ma, accurate to 1g. 6.2.2 Laboratory sample
6.2.2.1 Split (tear) the B part of the batch sample, remove the soil and impurities, mix the sample thoroughly and evenly, remove the fluff fibers left in the impurities, and put them into the opened (torn) and mixed sample and weigh them together, which is called mb, accurate to 1g. 6.2.2.2 Divide the opened (torn) and mixed sample into two equal parts by the bisection method, one for the laboratory sample and the other for the reserve sample. 6.2.2.3 The K value is calculated according to formula (1):
Where: K—coefficient, rounded to four decimal places; mb
mass of the sample after splitting (tearing), g,
m.—mass of the sample before splitting (tearing), g.
6.2.2.4 The K value must be sealed together with the prepared sample. 6.2.3 Test samples
·(1)
6.2.3.1 Hand-pulled length samples: From the batch sample A, 10 hand-pulled length samples are randomly selected using the multi-point method, each with a mass of approximately 50 mg. 6.2.3.2 Fiber type, specification, quality characteristics and spot down samples: The batch sample A from which the hand-pulled length samples have been selected is used to determine the average diameter to determine the fiber type, specification, quality characteristics and spot down. 6.2.3.3 Down content samples: Three down content samples are randomly selected from the laboratory samples, each with a mass of 5 g, accurate to 0.01 g. 6.2.3.4 Cleanliness rate samples: Five cleanliness rate samples are randomly selected from the laboratory samples, each with a mass of 150 g×K, accurate to 0.1 g.
6.3 Test method
6.3.1 Hand-pulled length test
6.3.1.1. Take the length test sample, gently arrange it by hand, remove the thicker and longer goat hair, divide it equally with both hands and pull out the fibers, and arrange it repeatedly to make it into a small tuft with one end flat, naturally straight fibers and a width of about 20mm. Place the small tuft on the tuft board, and use a steel ruler to measure the length between its two ends without exposing the tuft board. The length is the sample length, accurate to 0.5mm. 6.3.1.2 The average value of the length of 10 samples is taken as the final result. The calculation result is rounded to an integer (in millimeters). 6.3.2 ~ Average diameter test
Sensory method can be used for inspection. If there is any objection to the sensory inspection result, it shall be inspected according to GB/T10685. 6.3.3 Fiber category, specification, quality characteristics and test grade of tuft point
Inspect the fiber type, specification, quality characteristics and defective velvet, and evaluate the specifications and etc. by combining the average diameter and hand-pulled length. 6.3.4 Cleanliness test
6.3.4.1 Randomly select three samples from the cleanliness test samples for washing, and keep the remaining two samples for backup. 6.3.4.2 See Table 3 for washing process.
Washing process
Washing solution
Control temperature
Washing timemin
.40~45
Note: The detergent is neutral, and the washing sugar ratio is 1!60. Try to wipe out the impurities such as grass and dirt in the original velvet during the washing process. The grass and dirt content of the original velvet after washing should be less than: 2%, and the oil content should be less than 1.5%.
:6.3.4.3 Drying: The washed sample shall be dried to the absolute dry mass according to GB/T.6500, and shall be calculated as m, accurate to 0.01g. 182
6.3.4.4 The cleaning rate shall be calculated according to formula (2):
Where: Y---cleaning rate of raw goat cashmere, %, m--absolute dry mass of the sample after cleaning, g
GB 18267--2000
Y㎡m.(100 +R.)
R. ——the public moisture regain of washed cashmere (R.=15), %. (2)
6.3.4.5 The average of the cleaning rates of the three samples shall be taken as the test result. When the range of the cleaning rates of the three samples exceeds 2%, the fourth and fifth samples shall be tested, and the average of the cleaning rates of the five samples shall be taken as the final result. The calculated result is rounded to two decimal places. 6.3.5 Clean down rate test
6.3.5.1 From the clean down that has been dried to absolute dry mass after the cleaning rate test, three clean down rate samples are quickly and randomly selected, each with a mass of 5g, of which two are tested in parallel and one is reserved as a backup sample. 6.3.5.2 After removing the coarse hair and impurities with a diameter greater than 25um from the sample with tweezers, dry the clean down fiber to absolute dry mass according to GB/T6500, recorded as mp, accurate to 0.0001g. 6.3.5.3 Test the oil content of clean down: Test the oil content of the clean down fiber (mp) according to GB/T6977. 6.3.5.4 The net down rate shall be calculated according to formula (3):
P=m×(100=)X(100+J)X(100+R)ma×(100+R,)×104
Wherein: P
Net down rate, %;
Absolute dry mass of net down, g;
Measured oil content, %;
Public oil content of combed down (J=1.5), %; Jp
Rpublic moisture regain of combed down (R-17), %;
Absolute dry mass of sample, g;
R—Public moisture regain of washed down (R—15), %; Y—washing rate, %.
(3)
6.3.5.5 The average value of the net down rate of the two samples shall be the test result. When the absolute difference between the net down rate of two samples exceeds 3%, a third sample shall be added and the average of the net down rate of the three samples shall be taken as the final result. The calculated result shall be rounded to two decimal places. 6.3.6 Net down gross weight test
6.3.6.1 Use a weighing instrument with a capacity of 100kg and a graduation value of 0.1kg to weigh each package of the same batch of raw down at the same time as the batch sample is taken, and record the gross weight to the nearest 0.1kg: Take two sample packages, remove the tare, and weigh the tare weight respectively to the nearest 0.01kg, and take the average value as the average tare weight of each package in this batch.
6.3.6.2 The total net weight of the raw cashmere of the inspection batch shall be calculated according to formula (4): m. = mg - Nmt
Wherein: m-the total net weight of the raw cashmere of the inspection batch, kg; mg
The total gross weight of the raw cashmere of the inspection batch, kg;
N-number of packages;
m-average skin weight per package, kg.
6.3.6.3 The net cashmere mass shall be calculated according to formula (5): m == PX mn/100
Wherein: m net cashmere mass, kg;
P-net cashmere rate, %;
The total net weight of the raw cashmere of the inspection batch, kg.
6.3.7 Down content test
GB 18267--2000
6.3.7.1 Randomly select two samples from the down content sample for parallel testing, and keep the other sample as a backup. 6.3.7.2 Use tweezers to remove the down fibers from the sample and weigh them to an accuracy of 0.01g. 6.3.7.3 The down content is calculated according to formula (6):
Where: H-
Down content, %;
K coefficient, determined by formula (1);
Down fiber mass, g,
Sample mass, g.
Kmc×100
（6）
6.3.7.4 The average of the down content of the two samples is the test result. When the absolute difference of the down content of the two samples exceeds 10% of the average value, a third sample shall be added, and the average of the down content of the three samples shall be taken as the final result. The calculation result shall be rounded to two decimal places. 6.4 Rounding of test data
Perform according to GB/T8170.
Part II
7 Technical indicators
7.1 Technical indicators of combed cashmere
Combed cashmere
The technical indicators of combed cashmere include eight items: average diameter, average length, coarseness rate, impurity rate, short fiber rate, average breaking strength, diameter variation coefficient, and heterochromatic fiber content.
7.2 The quality of combed cashmere is expressed in categories, models, and characteristics as follows: XXXXX-XXXXX
Category: Indicated by capital letters W, G, and B, representing white, green, and purple cashmere respectively. Category
Model: Indicated by five Arabic numerals, the first and second digits indicate the average diameter, the third and fourth digits indicate the average length, and the fifth digit indicates the roughness content. The average diameter is indicated by the unit digit and the decimal point of the average diameter. Characteristics: Indicated by five capital letters: impurity content, short fiber content, average breaking strength, diameter variation coefficient, and grade of heterochromatic fiber content. Each indicator is divided into three grades, A, BC, as shown in Table 4. The heterochromatic fiber content index of blue and purple velvet is set to C. Table 4 Index classification comparison table
.Grade
Impurity content
Short fiber content below 15mm
Average length>40 mm
Average length 30~40mm
Average length <30mm
Average breaking strength
Coefficient of diameter variation
Content of different-color fibers
Roots/5g
7.3 Example: W45382-ABACB
Indicates: white cashmere;
Average diameter: 14.5μm,
Average length: 38mm;
Roughness: 2%;
Impurity ≤2%;
Short-pile rate: ≤14%;
Average breaking strength: ≥3.5cN;
Coefficient of diameter variation: ≥23%;
Content of different-color fibers: ≤30 roots/5g.
7.4 The public moisture regain of combed cashmere is 17%. 7.5 The standard oil content of combed cashmere is 1.5%. 8 Test method
8.1 Instruments and tools
a) Electron microscope;
b) Microprojector;
) Single fiber strength tester;
d) Oven;
e) Balance (division value 0.01g, 0.0001g);f) Weighing instrument (division value 0.1kg, 0.01kg);GB 18267-2000
Table 4 (end)
g) Backing paper (the backing paper with uniform whiteness produced by the standardization department shall be used);h) Manual length standard plate (the manual length standard plate produced by the standardization department shall be used);i) Grease extractor.
8.2 Sample preparation
8.2.1 Batch sample
8.2.1.1 Sampling quantity: For mechanical packaging, samples shall be taken from 20% of the total number of packages. For soft packages of 20 packages or less, samples shall be taken from each package. For packages above 20, additional samples shall be taken from 30%. If the sample is less than one package, it shall be counted as one package. The total mass of quality samples shall not be less than 300g. Moisture regain batch sample: For 24 packages or less, samples shall be taken from each package. For packages above 24, the sampling packages shall be determined according to the principle of periodic random sampling. A total of 24 packages shall be taken, and one sample shall be produced for every three packages. A total of eight samples shall be produced. The total mass shall not be less than 400g.
8.2.1.2 Sampling method: The sampling packages shall be randomly determined, and samples shall be taken from the upper, middle and lower parts of the packages at a depth of 15cm or more from the foreskin. After the moisture regain batch sample is taken, it shall be placed in a sealed container immediately and weighed within 4 hours. 8.2.2 Laboratory samples
GB 18267--2000
Put the batch sample flat on the test bench and mix it thoroughly. Divide it into two equal parts by the bisection method, one for the laboratory sample and the other for the reserve sample. 8.2.3 Test specimens
8.2.3.1 Mix the laboratory samples thoroughly. Randomly select specimens from the front and back sides by the multi-point method. The quality and quantity of the specimens are shown in Table 5. Table 5 Sample quality and quantity
Test items
Roughness
Impurity
Content of different-colored fibers
Hand-stack length
Average diameter
Content of other animal fibers
Content of non-animal fibers
Fat content
Average breaking strength
Weight of each sample, g
8.2.3.2 Weigh the moisture regain test sample, each sample weighs 50g, accurate to 0.01g. 8.3 Test method
8.3.1 Test of roughness and impurity
Number of samples, pieces
8.3.1.1 Weigh the sample, accurate to 0.01g. Place the sample on a wool board with a large color contrast to the wool fiber being tested, remove the coarse hair and impurities (including skin flakes) with a whisk, and weigh the mass of each, accurate to 0.0001g. 8.3.1.2 The coarseness content is calculated according to formula (7):
B,=×1 000
Where: B-
coarseness content, %
coarse hair mass, g;
m——sample mass, g.
8.3.1.3 Impurity content is calculated according to formula (8):
m×1000
Where: B, impurity content, %o;
mz—impurity mass, g;
—sample mass, g.
8.3.1.4 When the absolute difference between the coarseness or impurity content of two samples exceeds 0.5%, a third sample shall be added and the average of the coarseness or impurity content of the three samples shall be taken as the final result. The calculated results of coarseness content shall be rounded to an integer and impurity content shall be rounded to one decimal place. 8.3.2 Test for heterochromatic fiber content
8.3.2.1 Weigh the mass of the sample to an accuracy of 0.01g. Place the sample on white backing paper and test under the condition of white light not less than 4001x. Use tweezers to wipe out the wool fibers with different colors from the white cashmere. 8.3.2.2 The content of heterochromatic fibers shall be expressed in the form of "α root/5g\, and the calculated result shall be rounded to an integer. 8.3.2.3 The average value of the heterochromatic fiber content of the two samples shall be the final result. 8:3.3 Hand-row length test
8.3.3.1 Sample preparation: Mix the laboratory sample thoroughly, randomly select fibers (not less than 40 points) from the front and back sides by multi-point method, about 150 mg, mix thoroughly, and divide into three equal parts, two of which are used for parallel tests and one is reserved for backup. 186
GB 18267—2000
8.3.3.2 Arrangement: Arrange the sample by hand repeatedly into a small pile with one end nearly flush and the fibers naturally straight. Hold the flush end of the small pile with your right hand, stick the other end to the pile board and hold the end with your left thumb. Slowly pull out the fibers from long to short from the pile, so that the fibers pulled out one by one are flush with the pile board from top to bottom and from left to right along the upper left end of the pile board. When all the fibers in your hand are pulled out, use a knife to pick up the sample and then arrange it into small piles. Repeat this operation several times (no more than five times) until the sample is evenly arranged into a length distribution diagram with a bottom length of 250mm±10mm and uniform fiber distribution (as shown in the figure). 1). ,mm
8.3.3.3 Drawing: Place the hand-arranged length standard plate on the arranged length distribution diagram, look directly at each observation point of the diagram, and record the relevant values according to the scale on the hand-arranged length standard plate. Take the bottom edge of the length distribution diagram as the horizontal coordinate and the fiber length as the vertical coordinate. Mark the horizontal coordinates x1, α2, *, x;,, n-1 from the origin every 10mm from left to right. If the interval of the last group is less than 10mm, mark the end point coordinate point n and measure the fiber lengths H, H2,, H;,, Hn corresponding to the midpoint of each group. The total length of the bottom edge of the length distribution diagram is n. 8.3.3.4 The average length is calculated according to formula (9): 10H +(α,- an--1)H,
average length, mm;
where: L
H.--fiber length corresponding to the coordinates of the midpoint of the i-th group, mm; α-total length of the bottom of the length distribution diagram, mm; H.--fiber length corresponding to the coordinates of the midpoint of the last group, mm. 8.3.3.5 Short lint rate is calculated according to formula (10):
S= ×100
Wu Zhong: S---short lint rate by number, %;
total length of the bottom of the length distribution diagram, mm;
(10)
-15mm length fiber H. corresponding horizontal coordinate value, mm. a.
8.3.3.6 The average of the average lengths of the two samples is the test result. When the absolute value difference of the average lengths of the two samples exceeds 2mm, a third sample shall be added and the average of the average lengths of the three samples shall be taken as the final result. The average length calculation result shall be rounded to an integer. The short-hair rate calculation result shall be rounded to one decimal place. 8.3.4 Average diameter test
Performed in accordance with GB/T10685.
8.3.5 Grease content test
Performed in accordance with GB/T6977.
8.3.6 Average breaking strength test
Performed by the CRE method in GB/T4711. 187
8.3.7 Moisture regain test
Performed in accordance with GB/T6500.
8.3.8 Other animal fiber content tests
Performed in accordance with GB/T14593 or GB/T16988. 8.3.9 Non-animal fiber content test
Perform according to GB/T2910 or GB/T2911.
8.3.10 Gross weight test
GB18267—2000
8.3.10.1 Each batch of combed cashmere traded in the market shall be subject to gross weight inspection. In the gross weight inspection, a weighing scale with a weighing capacity of 100kg and a graduation value of 0.1kg shall be used to weigh the same batch of combed cashmere, and the gross weight shall be recorded to an accuracy of 0.1kg. Two representative sample bags shall be peeled, and the tare shall be weighed, and the average value shall be taken as the average tare weight of each bag in this batch, to an accuracy of 0.01kg. 8.3.10.2 The weight shall be calculated according to formula (11):
(100 + R,) × (100 + J,)
(100 + R) X (100 + J.)
Combed down weight, kg:
Where: m -
Net weight of combed down in the inspection batch, kg;
R, — Standard moisture regain (R,=17%);
Jp — Standard grease content (J,1.5%);
R. — Actual moisture regain, %
J. — Actual grease content, %.
8.3.10.3 Net weight is calculated by formula (12):
m. - m. -
Wherein: ma--
net weight of the inspection batch of combed cashmere, kg;
-total gross weight of the inspection batch of combed cashmere, g;
total number of packages;
mt--average weight of each package, kg.
8.3.10.4 The calculation results of net weight and gross weight shall be rounded to two decimal places. 8.4 Rounding of test data
Perform according to GB/T8170.
Part III Rolled and scoured cashmere
9 Technical indicators
9.1 The average diameter, average length and net cashmere rate are the three indicators for the assessment of rolled and scoured cashmere. 9.2 The cashmere rate of washed and scoured cashmere is divided into three grades: A, B and C, as shown in Table 6. Table 6 Index Grade Comparison Table
Product Name
Washed Cashmere
Washed Cashmere
Cashmere Rate, %
(12)
9.3 The quality of washed and scoured cashmere is represented by six characters, namely, the category, model and characteristics. The first digit represents the category, the second and third digits represent the average diameter, the fourth and fifth digits represent the average length, and the sixth digit represents the cashmere rate grade. The average diameter is represented by the unit digit and the decimal point of the average diameter. The average length is rounded to an integer. 188
9.4 Example: W5435B
represents: white cashmere;
average diameter: 15.4μm;
average length: 35mm;
Cashmere Rate: 68%~~72%.
10 Test method
10.1 Instruments and tools
a) Wool type impurity analyzer;
b) Wool washing equipment;
c) Grease extractor;
d) Eight-basket oven;
e) Water bath;
f) Dehydrator;
GB 18267--2000
g) Balance (division value 1g, 0.01g, 0.0001g). 10.2 Sample preparation
10.2.1 Batch sample
10.2.1.1 Sampling quantity: For mechanical packaging, samples shall be taken from 20% of the total number of packages; for soft packaging of 20 packages or less, samples shall be taken from each package, and the additional part shall be taken from 30% of the additional part above 20 packages, and less than one package shall be counted as one package. The quality sample of washed velvet shall not be less than 2kg, and the quality sample of clean velvet shall not be less than 1kg. Moisture regain batch sample: 24 bags or less are sampled one by one; for bags over 24, the sampling bags are determined according to the principle of periodic random sampling, with a total of 24 bags, and one sample is produced for every three bags. A total of eight samples are produced. The total mass is not less than 400g. 10.2.1.2 Sampling method: Randomly determine the sampling bags, and take samples from the upper, middle and lower parts of the bags at a depth of 15cm or more from the foreskin. After sampling, put them in a sealed container immediately and weigh them within 4 hours. 10.2.2 Laboratory samples
Weigh the mass of the sampled batch within the specified time, recorded as m. , and then put it on the test bench to mix it thoroughly, remove the seven impurities and weigh its mass, record it as mb, accurate to 1g, and divide it into two equal parts by bisection method, one for laboratory samples and one for reserve samples 10.2.3 Test samples
10.2.3.1 Randomly extract samples from laboratory samples at multiple points. The number and mass of samples are shown in Table 7. Table 7 Sample mass and quantity
Sample item
Clean fluff rate of wheeled fluff
Clean fluff rate of washed fluff
Hand-laid length
Average diameter
Contains coarse and impurity rate
Mass of each sample·g
10.2.3.2 Weigh the moisture regain samples, each sample has a mass of about 50g, accurate to 0.01g. 10.3 Test method
Number of samples, copies
10.3.1 Test of the clean down rate of the wheeled down
10.3.1.1 Washing: Randomly select two samples from the three samples and wash them separately. The washing process is the same as 6.3.4.2. 10.3.1.2 Dehydration: Put the two washed samples into silk bags respectively and put them in a dehydrator for dehydration for 5 minutes. 10.3.1.3 Mechanical separation and clean down: Put the dehydrated samples on the feeding plate of the wool type impurity analyzer and feed them slowly into the impurity analyzer. The separated down falls into the front bin, the coarse wool and the impurities fall into the rear bin. Then the down fibers, coarse wool and impurities are taken out from the front and rear bins respectively and fed into the 1893.10.4 The calculation results of net weight and common quantity shall be rounded to two decimal places. 8.4 Rounding of test data
Perform according to GB/T8170.
Part III Washed and cleaned cashmere
9 Technical indicators
9.1 The average diameter, average length and net cashmere rate are the three indicators for evaluation of washed and cleaned cashmere. 9.2 The net cashmere rate of washed and cleaned cashmere is divided into three grades: A, B and C, see Table 6. Table 6 Index grade comparison table
Product name
Washed cashmere
Washed cashmere
Net cashmere rate, %
(12)
9.3 The quality of washed and cleaned cashmere is represented by six characters, namely, the category, model and characteristics. The first digit represents the category, the second and third digits represent the average diameter, the fourth and fifth digits represent the average length, and the sixth digit represents the net cashmere rate grade. The average diameter is expressed by the unit digit and the decimal point of the average diameter. The average length is rounded to an integer. 188
9.4 Example: W5435B
means: white cashmere;
average diameter: 15.4μm;
average length: 35mm;
net cashmere rate: 68%~~72%.
10 Test method
10.1 Instruments and tools
a) Wool type impurity analyzer;
b) Wool washing equipment;
c) Grease extractor;
d) Eight-basket oven;
e) Water bath;
f) Dehydrator;
GB 18267--2000
g) Balance (division value 1g, 0.01g, 0.0001g). 10.2 Sample preparation
10.2.1 Batch sample
10.2.1.1 Sampling quantity: For mechanical packaging, samples shall be taken from 20% of the total number of packages; for soft packaging of 20 packages or less, samples shall be taken from each package, and the additional part shall be taken from 30% of the additional part above 20 packages, and less than one package shall be counted as one package. The quality sample of washed velvet shall not be less than 2kg, and the quality sample of clean velvet shall not be less than 1kg. Moisture regain batch sample: 24 bags or less are sampled one by one; for bags over 24, the sampling bags are determined according to the principle of periodic random sampling, with a total of 24 bags, and one sample is produced for every three bags. A total of eight samples are produced. The total mass is not less than 400g. 10.2.1.2 Sampling method: Randomly determine the sampling bags, and take samples from the upper, middle and lower parts of the bags at a depth of 15cm or more from the foreskin. After sampling, put them in a sealed container immediately and weigh them within 4 hours. 10.2.2 Laboratory samples
Weigh the mass of the sampled batch within the specified time, recorded as m. , and then put it on the test bench to mix it thoroughly, remove the seven impurities and weigh its mass, record it as mb, accurate to 1g, and divide it into two equal parts by bisection method, one for laboratory samples and one for reserve samples 10.2.3 Test samples
10.2.3.1 Randomly extract samples from laboratory samples at multiple points. The number and mass of samples are shown in Table 7. Table 7 Sample mass and quantity
Sample item
Clean fluff rate of wheeled fluff
Clean fluff rate of washed fluff
Hand-laid length
Average diameter
Contains coarse and impurity rate
Mass of each sample·g
10.2.3.2 Weigh the moisture regain samples, each sample has a mass of about 50g, accurate to 0.01g. 10.3 Test method
Number of samples, copies
10.3.1 Test of the clean down rate of the wheeled down
10.3.1.1 Washing: Randomly select two samples from the three samples and wash them separately. The washing process is the same as 6.3.4.2. 10.3.1.2 Dehydration: Put the two washed samples into silk bags respectively and put them in a dehydrator for dehydration for 5 minutes. 10.3.1.3 Mechanical separation and clean down: Put the dehydrated samples on the feeding plate of the wool type impurity analyzer and feed them slowly into the impurity analyzer. The separated down falls into the front bin, the coarse wool and the impurities fall into the rear bin. Then the down fibers, coarse wool and impurities are taken out from the front and rear bins respectively and fed into the 1893.10.4 The calculation results of net weight and common quantity shall be rounded to two decimal places. 8.4 Rounding of test data
Perform according to GB/T8170.
Part III Washed and cleaned cashmere
9 Technical indicators
9.1 The average diameter, average length and net cashmere rate are the three indicators for evaluation of washed and cleaned cashmere. 9.2 The net cashmere rate of washed and cleaned cashmere is divided into three grades: A, B and C, see Table 6. Table 6 Index grade comparison table
Product name
Washed cashmere
Washed cashmere
Net cashmere rate, %
(12)
9.3 The quality of washed and cleaned cashmere is represented by six characters, namely, the category, model and characteristics. The first digit represents the category, the second and third digits represent the average diameter, the fourth and fifth digits represent the average length, and the sixth digit represents the net cashmere rate grade. The average diameter is expressed by the unit digit and the decimal point of the average diameter. The average length is rounded to an integer. 188
9.4 Example: W5435B
means: white cashmere;
average diameter: 15.4μm;
average length: 35mm;
net cashmere rate: 68%~~72%.
10 Test method
10.1 Instruments and tools
a) Wool type impurity analyzer;
b) Wool washing equipment;
c) Grease extractor;
d) Eight-basket oven;
e) Water bath;
f) Dehydrator;
GB 18267--2000
g) Balance (division value 1g, 0.01g, 0.0001g). 10.2 Sample preparation
10.2.1 Batch sample
10.2.1.1 Sampling quantity: For mechanical packaging, samples shall be taken from 20% of the total number of packages; for soft packaging of 20 packages or less, samples shall be taken from each package, and the additional part shall be taken from 30% of the additional part above 20 packages, and less than one package shall be counted as one package. The quality sample of washed velvet shall not be less than 2kg, and the quality sample of clean velvet shall not be less than 1kg. Moisture regain batch sample: 24 bags or less are sampled one by one; for bags over 24, the sampling bags are determined according to the principle of periodic random sampling, with a total of 24 bags, and one sample is produced for every three bags. A total of eight samples are produced. The total mass is not less than 400g. 10.2.1.2 Sampling method: Randomly determine the sampling bags, and take samples from the upper, middle and lower parts of the bags at a depth of 15cm or more from the foreskin. After sampling, put them in a sealed container immediately and weigh them within 4 hours. 10.2.2 Laboratory samples
Weigh the mass of the sampled batch within the specified time, recorded as m. , and then put it on the test bench to mix it thoroughly, remove the seven impurities and weigh its mass, record it as mb, accurate to 1g, and divide it into two equal parts by bisection method, one for laboratory samples and one for reserve samples 10.2.3 Test samples
10.2.3.1 Randomly extract samples from laboratory samples at multiple points. The number and mass of samples are shown in Table 7. Table 7 Sample mass and quantity
Sample item
Clean fluff rate of wheeled fluff
Clean fluff rate of washed fluff
Hand-laid length
Average diameter
Contains coarse and impurity rate
Mass of each sample·g
10.2.3.2 Weigh the moisture regain samples, each sample has a mass of about 50g, accurate to 0.01g. 10.3 Test method
Number of samples, copies
10.3.1 Test of the clean down rate of the wheeled down
10.3.1.1 Washing: Randomly select two samples from the three samples and wash them separately. The washing process is the same as 6.3.4.2. 10.3.1.2 Dehydration: Put the two washed samples into silk bags respectively and put them in a dehydrator for dehydration for 5 minutes. 10.3.1.3 Mechanical separation and clean down: Put the dehydrated samples on the feeding plate of the wool type impurity analyzer and feed them slowly into the impurity analyzer. The separated down falls into the front bin, the coarse wool and the impurities fall into the rear bin. Then the down fibers, coarse wool and impurities are taken out from the front and rear bins respectively and fed into the 189
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