The common inspection method for cloth is the "four-point scoring method". In this "four-point scale", the maximum score for any single defect is four. No matter how many defects there are in the cloth, the defect score per linear yard shall not exceed four points.
The standard of scoring：
1. Defects in warp, weft and other directions will be evaluated according to the following criteria:
One point: the defect length is 3 inches or less
Two points: the defect length is greater than 3 inches and less than 6 inches
Three points: the length of the defect is greater than 6 inches and less than 9 inches
Four points: the defect length is greater than 9 inches
2. The scoring principle of defects:
A. Deductions for all warp and weft defects in the same yard shall not exceed 4 points.
B. For serious defects, each yard of defects will be rated as four points. For example: All holes, holes, regardless of diameter, will be rated four points.
C. For continuous defects, such as: rungs, edge-to-edge color difference, narrow seal or irregular cloth width, creases, uneven dyeing, etc., each yard of defects should be rated as four points.
D. No points will be deducted within 1" of the selvage
E. Regardless of the warp or weft, no matter what the defect is, the principle is to be visible, and the correct score will be deducted according to the defect score.
F. Except for special regulations (such as coating with adhesive tape), usually only the front side of the grey fabric needs to be inspected.
Inspection
1. Sampling procedure:
1), AATCC inspection and sampling standards: A. Number of samples: multiply the square root of the total number of yards by eight.
B. Number of sampling boxes: the square root of the total number of boxes.
2), sampling requirements:
The selection of papers to be examined is entirely random.
Textile mills are required to show the inspector a packing slip when at least 80% of the rolls in a batch have been packed. The inspector will select the papers to be inspected.
Once the inspector has selected rolls to be inspected, no further adjustments may be made to the number of rolls to be inspected or the number of rolls that have been selected for inspection. During inspection, no yardage of fabric shall be taken from any roll except to record and check color. All rolls of cloth that are inspected are graded and the defect score is assessed.
2. Test score
The calculation of the score In principle, after each roll of cloth has been inspected, the scores can be added up. Then, the grade is assessed according to the acceptance level, but since different cloth seals must have different acceptance levels, if the following formula is used to calculate the score of each roll of cloth per 100 square yards, it only needs to be calculated at 100 square yards According to the specified score below, you can make a grade assessment for different cloth seals. A = (Total points x 3600) / (Yards inspected x Cutable fabric width) = points per 100 square yards
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Post time: Oct-27-2022