GB/T 16255.2-2008Test method for the percentage of burry and impurities in scoured mohair (English PDF)
洗净马海毛含草、杂率试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 20, 2008
Implementation date
December 1, 2008
Scope
GB/T 16255.2-2008 is the English-translated version of 洗净马海毛含草、杂率试验方法.
GB/T 16255.2-2008 is the Chinese standard "Test method for the percentage of burry and impurities in scoured mohair". Its scope clause reads: GB/T 16255 provisions of this part of the way by hand sorting determination Wash sloppy, impurity rate test method containing mohair.
This section applies to washing lambs wool mohair, including determination of sloppy cleaning trash content adult mohair. Its clauses include equipment and instruments.
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Document preview — GB/T 16255.2-2008
National Standard of the People's Republic of China
- ICS
- 59.060.10
- Classification
- W 21
- Replacing
- GB/T 16255.2-1996
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 equipment and instruments
- 4.1 Sampling and sample preparation
- 4.2 Test procedure
- 4.3 Calculation Results
1 Scope
GB/T 16255 provisions of this part of the way by hand sorting determination Wash sloppy, impurity rate test method containing mohair.
This section applies to washing lambs wool mohair, including determination of sloppy cleaning trash content adult mohair.
2 Normative references
The following documents contain provisions which, through reference GB/T 16255 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 8170 numerical rounding rules
GB/T 14269 wool test sampling methods
3 equipment and instruments
a) Balance. Range 200g, dividing the value of 0.01g; range 200g, division value 0.0001g;
b) mesh, 60 mesh;
c) forceps;
d) containing material plate.
Test Method 4
4.1 Sampling and sample preparation
4.1.1
Wash mohair laboratory samples drawn in accordance with the provisions of GB/T 14269 of.
4.1.2
After thoroughly mixed laboratory sample, tiled test stand.
4.1.3
multi-point method from both sides of the laboratory sample random test sample, each side of not less than 20 points.
4.1.4
The test samples taken into triplicate, one of which as sample preparation. The quality of each sample of 5g, to the nearest 0.01g.
4.2 Test procedure
4.2.1
Sheng dish placement was white paper or black light paper, in order to clearly distinguish impurities.
4.2.2
The screen on the paper, then the sample is placed in the sieve.
4.2.3
In manual sorting manner tear loose the first sample, then, to be able to clearly distinguish between, and attached to the sample mixed grass and impurities picked with tweezers
Years, were placed.
4.2.4
Weigh the grass, the quality of impurities, accurate to 0.0001g.
4.3 Calculation Results
4.3.1
hasty press containing the formula (1) calculations.
F = 2 × m1 m1
100% (1)
Where.
F --- containing sloppy%;
Mass m1 --- grass in grams (g);
M1 2 --- quality of the sample, in grams (g).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 16255.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 16255.2-2008 | Test method for the percentage of burry and impurities in scoured mohair | current edition | Current |
| GB/T 16255.2-1996 | Test method for the percentage of burry and impurities in scoured mohair | previous edition | Superseded |
This page sells the current edition, GB/T 16255.2-2008. Earlier editions are listed for reference only.
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