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BS EN ISO 2061:2015 Textiles. Determination of twist in yarns. Direct counting method, 2015
- Contents Page
- European foreword
- Endorsement notice
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Apparatus
- 6 Standard atmosphere
- 7 Sampling
- 8 Test specimens
- 8.1 Length
- 8.1.1 Single spun yarns
- 8.1.2 Single multifilament, plied, and cabled yarns
- 8.2 Selection
- 8.3 Number of test specimens
- 9 Procedure 1 — Determination of the direction of twist
- 10 Procedure 2 — Determination of the amount of twist
- 10.1 Preliminary procedure
- 10.2 Single, spun yarn
- 10.3 Single, multifilament yarns
- 10.4 Plied yarns
- 10.5 Cabled yarns
- 11 Calculation of results
- 11.1 Average twist per specimen
- 11.2 Average twist per sample
- 11.3 Variation of observations
- 11.4 Change in length on untwisting
- 11.5 Twist factor (α)
- 12 Expression of results
- 13 Test report
- 13.1 General
- 13.2 Single yarns
- 13.3 Plied yarns
- 13.4 Cabled yarns
- Annex A (informative) Suggested procedure for sampling
- Bibliography [Go to Page]
