I am a student of BSc in Textile Engineering at Dhaka University of engineering and Technology . I share my knowledge which i gathered from my varsity

1. Dhaka University of Engineering & Technology, (DUET) Gazipur
Department of Textile Engineering
Course NO: TE- 3402
Course Name: Apparel Manufacturing Engineering-1
(Sessional)
Date of Submission: 28-04-21
Experiment No: 04
Name of the Experiment: Fabric Evaluation by 4-point
Inspection System.
Submitted To
Mr. Ayub Ali
Assistant Professor,
Department of TE
DUET
Submitted By
Name: Md. Rasel mondal
Student ID: 175013
Year/Semester: 3/1
Session: 2019-20
Lab Date: 21-04-21

2. Experiment No: 04
Experiment Name: Fabric Evaluation by 4-point Inspection System.
1.0 Introduction:
1.1 Significance of Fabric Inspection:
• Fabric inspection ensures to minimize the rejection of cut panels or rejected
garments due to fabric faults.
• Cutting inspected and approved fabric ensures not only finished garment
quality but also reduces rejects, improves efficiency and timely deliveries.
• To selection a suitable material.
1.2 Fabric Inspection system:
There are various fabric inspection systems. Some commonly used
Inspection systems are:
• 4- Point system.
• 10-Point System.
1.3 Benefits:
• The main objective of the inspection is the detection of defects and non-
conformance as early as possible in the manufacturing process.
• Minimizing the time and money wastage by correcting the defective raw
materials.
• Fabrics supplied to customers meet their specifications and standards;
thereby they face less customer returns and recalls.
• Fabric inspection ensures to minimize the rejection of cut panels or rejected
garments due to fabric faults.
• Cutting inspected and approved fabric ensures not only finished garment
quality but also reduces rejects, improves efficiency and timely deliveries
2.0 Objectives:
• To know about 4-point inspection system.
• To evaluate fabric quality using 4-point inspection system.
3.0 Methods: 4-point inspection system:

3. 3.1 Principle:
• 4 Point system for fabric inspection is widely used in apparel industry for
fabric quality inspection.
• The 4-Point System, also called the American Apparel Manufacturers
(AAMA) point-grading system for determining fabric quality, is widely used
by producers of apparel fabrics
• The 4-Point System assigns 1, 2, 3 and 4 penalty points according to the size
and significance of the defect. No more than 4 penalty points can be
assigned for any single defect. Defect can be in either length or width
direction, the system remains the same. Only major defects are considered.
No penalty points are assigned to minor defects.
• In this system, one should inspect at least 10 percent of the total rolls in the
shipment and make sure to select at least one roll of each color way.
• Fabric defects are assigned points based on the following:
3.2 General Inspection Procedures:
• Fabric inspection is done in suitable and safe environment with enough
ventilation and proper lighting.
• Fabric passing through the inspection frame must be between 45 - 60 degree
angles to inspector and must be done on appropriate Cool White light above
viewing area. Back light can be used as and when needed.
• Fabric speed on inspection machine must not be more than 15 yards per
minute.
• All fabric inspection must be done when 80% of good or lot is received.

4. • Standard approved bulk dye lot standards for all approved lots must be
available prior to inspection.
• Approved standard of bulk dye lot must be available before starting
inspection for assessing color, hand, weight, construction, finish and visual
appearance.
• Shade continuity within a roll by checking shade variation between center
and selvage and the beginning, middle and end of each roll must be
evaluated and documented.
• Textiles like knits must be evaluated for weight against standard approved
weight.
• Fabric width must be checked from selvage to selvage against standard.
• All defects must be flagged during inspection.
• The length of each roll inspected must be compared to length as mentioned
on supplier ticketed tag and any deviation must be documented and reported
to mill for additional replacement to avoid shortage.
• If yard dyed or printed fabrics are being inspected the repeat measurement
must be done from beginning, middle and end of selected rolls
3.3 Fault Measurement:
Fabric Length: 82 meters and Fabric Width: 56 inches

5. h Fault Measurement:
Fault Length No. of Fault Penalty Point
>9 inch
6-9 inch
3-6 inch
<3 inch
<1 (Holes)
j
7.2
Inch 7
Time
<3 Inch
9 Times
4.5 Inch
8 Times
5 Inch
2 Times
>1 Inch
3 Times
>1 Inch
1 Times
< 1 Inch
5 Times
>9 Inch 10 Times

6. Fault Length No. of Fault Penalty Point
>9 inch 10 40
6-9 inch 7 21
3-6 inch 8 16
<3 inch 9 9
<1 (Holes) 5 10
>1 (Holes) 4 16
Total points= 112
We know,
Points/100 square yards= Total points in roll*36*100/ Fabric length in yards*
fabric width in inches
= 112*36*100/ 82*1.0936*56
= 80
4.0 Result:
Since the value is > 40; so, we can comment that is the reject one.
5.0 Discussion:
To improve the fabric:
➢ Re- Treatment
➢ Finishing
➢ Others (Knitting parameters yarn quality, dyeing)

7. 6.0 Conclusion:
By this experiment we gained knowledge about 4-point inspection system. By
this experiment we are able to produce good quality of fabric. This
experiment is very helpful for us in our future life.