Standard No.:	GB/T 4668-1995
English Name:	Textiles－Woven fabrics－Determination of number of threads per unit length
Chinese Name:	机织物密度的测定
Chinese Classification:	W04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	59.080.30 59.080.30    Textile fabrics 59.080.30
Issued by:	AQSIQ
Issued on:	1995-12-8
Implemented on:	1996-5-1
Status:	valid
Superseding:	GB 4668-1984 GB 8678-1988
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	60.0
Delivery:	via email in 1 business day

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