This standard specifies three methods for the determination of number of threads per unit length in woven fabrics. Any of the three methods may be used, the choice depending on the character of the fabric. However, in case of dispute method A is recommended.
This standard is applicable to the determination of number of threads per unit length in various woven fabrics.
Method A: Dissection of fabric, suitable for all fabrics, in particular, complicated weaves.
Method B: Counting glass, suitable for fabrics with more than 50 threads per centimetre.
Method C: Traversing thread counter, suitable for all woven fabrics.
Note: Three methods using parallel line gratings, tapered line gratings and optoelectronic scanning density meter for the determination of number of threads per unit length in woven fabrics have been given in Annex A (Informative) for information. These methods have low measurement accuracy and limitation but can be used to give rapid and rough estimates.
1 Subject Content and Application Scope
2 Normative References
3 Definitions
4 Principle
5 Minimum Measuring Distance
6 Conditioning and Testing Atmosphere
7 Test Specimen
8 Method A-Dissection of Fabric
9 Method B-Counting Glass
10 Method C-Traversing Thread Counter
11 Calculation and Expression of Results
12 Test Report
Annex A Method for the Determination of the Number of Threads Using Gratings and Optoelectronic Scanner (Informative)
Additional Explanation
This standard specifies three methods for the determination of number of threads per unit length in woven fabrics. Any of the three methods may be used, the choice depending on the character of the fabric. However, in case of dispute method A is recommended.
This standard is applicable to the determination of number of threads per unit length in various woven fabrics.
Method A: Dissection of fabric, suitable for all fabrics, in particular, complicated weaves.
Method B: Counting glass, suitable for fabrics with more than 50 threads per centimetre.
Method C: Traversing thread counter, suitable for all woven fabrics.
Note: Three methods using parallel line gratings, tapered line gratings and optoelectronic scanning density meter for the determination of number of threads per unit length in woven fabrics have been given in Annex A (Informative) for information. These methods have low measurement accuracy and limitation but can be used to give rapid and rough estimates.
Contents of GB/T 4668-1995
1 Subject Content and Application Scope
2 Normative References
3 Definitions
4 Principle
5 Minimum Measuring Distance
6 Conditioning and Testing Atmosphere
7 Test Specimen
8 Method A-Dissection of Fabric
9 Method B-Counting Glass
10 Method C-Traversing Thread Counter
11 Calculation and Expression of Results
12 Test Report
Annex A Method for the Determination of the Number of Threads Using Gratings and Optoelectronic Scanner (Informative)
Additional Explanation
