1 Scope
This part of GB/T 23319 specifies three procedures (diagonal marking, inverted-T marking and mock-garment marking) to measure the spirality of woven and knitted fabrics after laundering.
The results obtained from different procedures may not be comparable.
This part is not intended to measure the spirality of fabrics as manufactured, but rather the spirality after laundering.
Note: Some fabric constructions, such as denim, can have spirality intentionally introduced during manufacturing. Fabrics made on circular knitting machines can have inherent nonverticality of wale alignment.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 23319, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing (GB/T 6529-2008, ISO 139:2005, MOD)
GB/T 8629 Textiles - Domestic washing and drying procedures for textile testing (GB/T 8629-2001, eqv ISO 6300:2000)
3 Terms and definitions
For the purposes of this part of GB/T 23319, the following terms and definitions apply.
3.1
spirality
〈in textiles〉 fabric condition, wherein filling yarns or knitted courses are angularly displaced from a line perpendicular to the edge or side of a fabric or garment
4 Principle
Test specimens are cut, prepared, marked, and laundered according to specified procedures. Spirality is measured in millimetres, percentage of a marked distance, or angle of nonverticality.
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Conditioning
7 Test specimen preparation and marking procedures
8 Laundering
9 Assessment
10 Test report
