GB/T 17760-2019 English PDF (GBT17760-2019)

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GB/T 17760-2019: Inspection method for printed or dyed fabric surface defects
GB/T 17760-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
W 70
Replacing GB/T 17760-2009
Inspection Method for Printed or Dyed Fabric Surface
Defects
ISSUED ON: JUNE 4, 2019
IMPLEMENTED ON: JANUARY 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Terms and Definitions ... 4 
4 Inspection Conditions and Operational Stipulations ... 5 
5 Inspection Methods ... 5 
6 Inspection Report ... 8 
Appendix A (normative) Specific Content of Various Fabric Surface Defects .. 9 
Appendix B (normative) Description of Defect Names ... 11 
Inspection Method for Printed or Dyed Fabric Surface
Defects
1 Scope
This Standard stipulates the terms, definitions, inspection conditions, operational
stipulations, inspection methods and inspection report of inspection method for printed
or dyed fabric surface defects.
This Standard is applicable to various kinds of bleached, dyed and printed fabric, which
is produced through machine-weaving, and with the raw material of cotton, chemical
fiber and other pure or blended natural yarn.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 250 Textiles - Tests for Color Fastness - Grey Scale for Assessing Change in
Color;
GB/T 24250 Woven Fabrics - Description of Defects - Vocabulary
3 Terms and Definitions
What is defined in GB/T 24250, and the following terms and definitions are applicable
to this document.
3.1 Point Assessing
Point assessing refers to the method which assesses the number and severity of fabric
surface defects through point and stipulates the maximum limit.
3.2 Defect Marking Method
Defect marking method refers to the method which displays the location and number
of certain surface defects through marking and stipulates length discount to replace
defects.
3.3 Damage
Damage refers to holes, broken edges, edge exclusions, and floats over 0.3 cm.
4 Inspection Conditions and Operational Stipulations
4.1 Inspection Conditions
4.1.1 During inspection, illuminance on the fabric surface shall be not lower than 750
lx. The distance between eyes and the fabric surface shall be 55 cm ~ 60 cm.
4.1.2 When platform inspection is adopted, use 3 ~ 4 PCS of 40 W cyan fluorescent
tubes with cover. The distance between the inspection light source and the fabric
surface shall be 1.0 m ~ 1.2 m.
4.1.3 When cloth inspection machine is adopted, the angle of the cloth inspection
board shall be 45. The highest linear speed of the cloth inspection machine shall be
40 m/min.
4.2 Operational Stipulations
4.2.1 Adopt cloth inspection machine or platform inspection.
4.2.2 The inspection of fabric surface defects shall subject to the front surface (the
surface with plait stamping) of cloth. In terms of twill fabric: yarn fabric: the left oblique
“↖” shall be the front surface; thread fabric: the right oblique “↗” shall be the front
surface. Or, the front surface of fabric may also be confirmed in accordance with the
customers’ demands.
4.2.3 Use measuring instrument to measure the length of each fabric surface defect.
The division value of the measuring instrument shall be 1 mm.
4.2.4 Chromatic aberration shall be assessed in accordance with GB/T 250.
4.2.5 When the cloth inspection machine and the platform inspection are contradictory,
the result shall subject to platform inspection.
5 Inspection Methods
5.1 Inspection of Partial Defects
5.1.1 Point assessing
5.1.1.1 Adopt four-point assessing method. The stipulations of point assessing shall
comply with Table 1.
Table 1 -- Stipulations of Four-point Assessing Method
3 0.2 cm and less than 0.2 cm dispersed defects that would affect the appearance; 15 dark-color defects and 10 light-color defects 1
4 Warp-wise 20.0 cm and less than 20.0 cm, 4 and less than 4 No. 1 and No. 2 defects 1
5.1.2.3 Stipulations of defect marking length discount: defect length does not exceed
20.0 cm: length discount shall be 20.0 cm; defect length is 20.0 cm ~ 50.0 cm, length
discount shall subject to the actual length of defect.
5.1.2.4 Above 2.0 cm broken holes, stopping gears in dyeing and finishing processing,
above 50.0 cm warp-wise severe defects shall not be marked. Instead, they shall be
cut through.
5.1.2.5 The location of defect marking shall all be on the fabric of corresponding parts
where the defect exists.
5.2 Inspection of Dispersed Defects
Inspection methods for dispersed defects may be degraded in accordance with the
degree of severity, the overall effect of the affected appearance and product standards.
5.3 Measurement of Defects
5.3.1 The length of defects shall be measured in accordance with the maximum warp-
wise or weft-wise length.
5.3.2 When the length of warp-wise defects exceeds 1 m, the excessive part shall be
separately measured and counted, then, assessed in accordance with Table 1.
5.3.3 Curved defects shall be measured in accordance with the maximum distance of
the actual influence. Overlapped defects shall be assessed in accordance with the
severity.
5.3.4 When various defects simultaneously exist in warp-wise 1 m and less than 1 m,
the defects shall be respectively measured and accumulatively assessed. The
maximum assessed point shall exceed 4-point; the maximum defect marking number
shall not exceed 1.
5.3.5 In terms of dispersed spots which are difficult to be counted or measured, in
accordance with the maximum length and width of such dispersion, respectively
measure and count them; accumulate the assessed point.
5.3.6 When the same partial defects exist in the same fabric, the accumulative point
shall not exceed the degraded limit point of the defect. When the point of other partial
defects that simultaneously exist shall be accumulated, plus the starting point of the
already-degraded grade and the accumulative point of partial defects. Thus, the total
point of the fabric can be obtained.
Appendix A
(normative)
Specific Content of Various Fabric Surface Defects
A.1 Warp-wise Defects
The specific content of warp-wise defects: bamboo joint, thick warp, misaligned density,
drafting misdrawn, reed mark, reed misdrawn, multi-strand warp, double warp, parallel
thread tightness, loose warp, tight warp, warp hanging, warp shrinkage ripple, breaking
wrap, breaking defect, sank yarn, star-shaped stitch, yarn skipping, cotton ball, knot,
temple defects, weft throwing, improper trimming, wrong fiber, grease stain, oil warp,
rust warp, rust stain, non-fading color wrap and non-fading color stain, water stain, dirt,
pulp spot, cloth blossom, oil yarn, cat ear, concave edge, rotten edge, flower warp,
long strip shadow, iron-shine, needle mark, grinding crack, improper stitch selvage,
reedness, wooden roller wrinkle, corrugated edge, hair point, fleece, down pile making,
thick and thin section, tool path, temple mark, strip flower, crumping wrinkle,
inconsistent pattern, uneven printing and dyeing, cotton knots and impurities, deep and
shallow spots, fish scale streak, missing cut, patchin...