This lesson is to introduce the knowledge of the fabric inspection. A. The method of penalty scores
Normally we will not use the AQL to assess the quality of fabric, we use the 4 point system to score the defects on fabric for fabric inspection.
The 4 point system provided a means of defining the defects according to the severity by assigning demerits and penalty points. All fabrics including the grey and finished, woven and knitting, can be grading by this system. Visible defects were scored in proportion to the size of the defects.
Penalty point, Defects in any direction, with the exception of specify, are scored as followings:
Note: No single Yard or single defects can be scored more than 4 points; Defects like holes, netting, dropped stitches, laddering and torn selvage are scored 4 points regardless of the defects size;
B. The sampling size
C. Acceptable points by fabric groups
-- Woven fabric:
-- Knitting Fabric:
D. Second quality criteria
1. The whole shipment would be Failed as below (any one):
1.1 If the Penalty points per shipment over requirement.
1.2 If the second quality percentage over 10%.
1.3 The total measured inspected length was more than +/ - 1% against the ticket length.
1.4 Any inspected roll’s design/pattern/ construction was not conformed to description on order or approved color swatch.
2. The individual roll would be considered as first quality (A grade) but the whole shipment would be pending, and no need to assign
penalty points to below defect:
3. The individual roll would be considered as second quality (B grade)and no need to assign penalty points to below defect:
4. The Individual roll would be considered as second quality (B grade) and assigned penalty points:
5. The individual roll would be considered as second quality (B grade) and need not count penalty points:
******The end of this lesson********。