Inspection of gray fabric

Inspection of gray fabric:

            The process of observing and locating different types of faults in gray fabric is known as inspection of gray fabric.

Types of faults in the gray fabric:

• v  Broken picks
• v  Broken ends
• v  Cut weft (pinhole in fabric due to cut r breakage of pick)
• v  Neps, peels, and cracks
• v  Missing of interlacement of pick and end
• v  Yarn contamination
• v  Floating or protruding fibers
• v  Hang Pick( a pick is out of line for short distance creating hole cavity)
• v  Wrong Drawing (wrong order of drawing ends through heals and reeds

  Four Point inspection system of fabric:

           The 4-Point System assigns 1, 2, 3 and 4 penalty points according to the size and significance of the defect. Points are assigned according to the following criteria:

                           

Penalty Point Defects in Warp Except Holes Torn	1 Up to 3²	2 From1²to 6²	3 From 1²to 9²	4 From1² to 36²
Cutting Faults	Hole and Tear ¼ and over Heavy Crack and Float

Penalty points grading:

The following fabric penalty point grading standards are to be used during inspection.

1. No more than 4 penalty points may be assigned for any single defect.
2. No more than 4 penalty points may be assigned to one linear meter, regardless of the number of defects with in that one meter.
3. A continuous defect shall be assigned 4 points for each meter in which it occurs.
4. Any roll having a running defect through more than three continuous meters shall be rejected regardless of points count.
5. No roll shall be accepted that contains a full width defect in the first or last three meters.
6. A hole or torn is considered to be a major defect and shall be penalized 4 points.

No roll shall be accepted as first quality that exhibits a noticeable degree of looseness of tightness or ripples, puckers, folds or creases in the body of the fabric

Major & minor Penalty Points

           

Average Point: Average point is calculated by following formula.

                                                                                (Total Points) X (3937)

Total Average Points=

Per 100 Meter²                                               (Total length in Meters) X (Width)

                                                                              (Total Points) X 3600

Total Average Points =

Per 100 Yards²                                              (Total length in Meters) X (Width)

• Ø According to SOP (Standard operating Procedure) if there are 15 faults in 100 square meter then the fabric is acceptable for further processes.
• Ø If the faults are in between 15-18 then we correspond with the customer for its requirement. Customer decides whether it is acceptable or not.
• Ø If total faults in 100 sq meter are more than 18 then the fabric is rejected.