Fabric Inspection Standard

Until now, there is no internationally recognized fabric inspection standard, but Western Europe and the United States have their commonly used ten-point evaluation method and four-point evaluation method to control and deal with fabric defects. These two are the most commonly used systems.
l) ten-point evaluation method
This test standard is applicable to woven gray fabrics and finishing fabrics with any fiber composition, sealing degree and structure. Since the average buyer is concerned with the number of fabric cuts due to defects and the resulting complaints, not the nature or cause of the defects, this scoring method only evaluates the grade based on the size of the defects. The evaluation method is that the inspectors check the defects of each piece of fabric according to the defect scoring standard, record them on the report form, and give penalty points as the grade evaluation of the fabric.
a. Defect score
Points are deducted according to the length of the defect.
Defect length Penalty points
10-36 inches 10 points
5-10 inches 5 points
1-5 inches 3 points
1 point under 1 inch
Defect length Penalty points
Full sealing degree 10 points
5 inches to half seal 5 minutes
1-5 inches 3 points
1 inch 1 minute
Unless otherwise stated, the cloth inspection is limited to checking the defects on the cloth surface. In addition, defects within half an inch of the selvedge can be ignored. The sum of warp and thread defects per yard of fabric must not exceed 10 points; in other words, even if there are many or very serious defects, the maximum penalty score is only 10 points. If the defect occurs repeatedly over a substantial length, in which case the piece of fabric shall be rated “Inferior” even if the sum of the penalty points is less than the yardage checked.
b. Grade assessment
According to the results of the inspection, the imitation is evaluated as “prime” quality or “secondary” quality. If the sum of the penalty points is less than the inspected yardage, the piece of fabric is rated as “First Class”. If the total penalty points exceed the checked yardage, the piece of fabric is rated as “Secondary”. Since there is a greater chance of defects attached to the wider cloth cover, it is recommended that the cloth cover exceed 50 inches. The penalty point limit for cloth can be loosened slightly, but should not be more than 10%.

2) Four-point evaluation method
This scoring method is mainly applied to knitted fabrics, but can also be applied to woven fabrics. The basic concepts and models of the “four-point system” and the “+-point system” are very similar, except for the difference in the penalty points. The evaluation method is the same as the “+ point system J. The inspectors check the defects of each piece of fabric according to the defect scoring standard, record them on the report form, and give penalty points as the grade evaluation of the fabric.
a. Defect score
Defect points are deducted regardless of latitude and longitude, and an appropriate point deduction will be given according to the length of the defect table.
Defect length Penalty score
3 inches or less 1 point
More than 3 inches but not more than 6 inches 2 points
More than 6 inches but not more than 9 inches 3 points
More than 9 inches 4 points
Larger flaws (with holes regardless of their size) are scored as four-point checks per 1 yard
Unless otherwise stated, it is only necessary to check for defects on the cloth surface. In addition, defects within one inch of the selvedge can be ignored. The maximum penalty is 4 points per yard of fabric, regardless of width. 4 points will be deducted for special flaws such as holes and shuttles.
c. Grade assessment
Regardless of the number of fabrics to be checked, the inspection system must be based on the sum of the scores for the length of one hundred square yards of fabric. If the defect score exceeds 40 points, the piece of fabric is rated as “substandard” and substandard.
d. The calculation formula is:
Average deduction points for 100 square yards = (total deduction points X 100 X 36) / total inspection yards X specification width (inches)
Unless the specifications of the fabric are wrong, the invisible defects on the surface will not be counted, and the minor defects will not be recorded.
It is not allowed to exceed 4 points within one yard, and any continuous defect will be rated as 4 points. For example, poor size and holes will be rated as 4 points. Like rungs, color difference, narrow width, wrinkles, oblique roads, and even incomplete fabrics, all are calculated as 4 points/yard. No need to consider length holes (yarn is cut or broken, or stitches are missing), the following situations are treated as 4 points: arm-length oil stains, obvious drawn yarn or roving, poor weft, lack of color, less warp and less latitude. The following defects are determined by length, dyed strips, thin seams, cracks, horizontal or vertical lines, wrinkles, light and heavy yarn ends, crosspieces.

REHOW Textile Machinery
An enterprise specializing in textile machinery manufacturing, it is committed to providing high-quality mechanical equipment and technical solutions for the global textile industry.

The REHOW fabric fault recording system met their needs. Compared with other Chinese cloth inspection machine manufacturers, rehow has an experienced technical team, our advantage lies in providing customized solutions and providing the best service for every customer.

We will install the software into the computer and connect the computer with the machine, after receiving our machine, the operator needs to identify 24 defects into the software in the computer, the computer will record some general information input, such as date , order, shift, operator name. When the operator finds a defect during the inspection, manually shut down, select the defect on the operation panel and give a penalty of 1-4 severity. The computer records the type, location and severity of the detection. The printer prints the result.

We will provide the complete system, including software system, industrial computer, printer, in order to guide customers to use our system, we have prepared instruction videos in our youtube.