FZ/T 30003-2024 Textiles - Quantitative analysis of bast fibres and cotton blended - Light microscopy method
1 Scope
This document describes a test method for quantitative analysis of bast fibres and cotton blended products using a light microscopy (including a microprojector and a digital fibre analyzer).
It is applicable to blended products of ramie cotton, flax cotton, hemp cotton, as well as apocynum venetum and cotton.
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 of the referenced document (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
FZ/T 01057.3 Test method for identification of textile fibers - Part 3: Microscopy
3 Terms and definitions
No terms or definitions are listed in this document.
4 Principles
Both hemp and cotton fibres have unique appearance characteristics. In this method, light microscopes (including microprojector and digital fibre analyzer) are used to identify and count a certain number of fibres, and the fibre diameter or cross-sectional area is measured to calculate the mass percentages of various fibres.
5 Reagents
5.1 Distilled or deionized water.
5.2 Collodion or colourless transparent nail polish.
5.3 Anhydrous glycerol or liquid paraffin.
5.4 Sodium hypochlorite: 1mol/L.
5.5 N,N-dimethylformamide: analytical reagent.
6 Apparatus
6.1 Light microscopes include microprojectors and digital fibre analyzers.
6.1.1 Microprojector, with a magnification of at least 400x.
6.1.2 Digital fibre analyzer, containing microscope, camera, computer, acquisition card, special analysis software and display. The microscope shall be capable of providing a magnification of at least 500x. A micrometer scale for calibrating the magnification of the instrument shall be provided.
6.2 Oven, capable of maintaining a temperature of 105℃±3℃.
6.3 Fibre slicer.
6.4 Slide (with the same thickness as that of the object micrometer glass slide), coverslip, surface glass dish, scissors, tweezers, blade, etc.
6.5 Wedge-shaped ruler, printed with a scale magnified by 500x. A movable linear regular scale with a scale in millimetres may also be used.
7 Test procedures
7.1 Qualitative analysis of specimens and sampling
7.1.1 Qualitative analysis
Comply with FZ/T 01057.3.
7.1.2 Sampling
7.1.2.1 Loose fibre
Randomly take about 10g of fibre from the laboratory sample, lay the test sample on the test bench, and take about 0.5g of fibre from different parts of the front and back sides of the sample (not less than 10 points on each side) with tweezers, fully mix them and divide them into three parts as evenly as possible. Organize them slightly to make the fibres present in essentially parallel fibre bundle.
7.1.2.2 Yarn
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Reagents
6 Apparatus
7 Test procedures
8 Calculation
9 Expression of test results
10 Test report
Annex A (Informative) Staining of the specimen
Annex B (Informative) Morphological characteristics of cotton fibres, ramie fibres, flax fibres, hemp fibres and apocynum venetum fibres
Annex C (Informative) Description of the calculation method of converted fibre number
Annex D (Informative) Reference fibre diameter
Annex E (Informative) Densities of cotton fibres, ramie fibres, flax fibres, hemp fibres and apocynum venetum fibres
