The most common inspection method for cloth is the “four-point scoring method”. On this “four-point scale,” the highest possible score for any single defect is four. No matter how many defects there are in the fabric, the defect score for each linear yard (Linear yard) must not exceed four points.
1. Scoring standards
1. For defects in longitude, latitude and other directions, the defect score will be evaluated according to the following standards:
One point: The length of the defect is 3 inches or less. Two points: The length of the defect 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 length of the defect is greater than 9 inches
2. Scoring principles for defects:
A. Deductions for all warp and weft defects in the same code shall not exceed 4 points. B. For serious defects, each yard of defect will be rated four points. For example: regardless of diameter, all holes and holes 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 edge of the fabric. E. Regardless of the warp or weft direction, no matter what the defect is, the principle is that it can be seen, and correct deductions will be given based on the defect score. F. Except for special regulations (such as coating Tape), usually only the front side of the gray cloth needs to be inspected.
2. Inspection
1. Sampling procedure:
1 ), AATCC inspection and sampling standards: A. Sampling quantity: the square root of the total number of yards multiplied by eight. B. Number of boxes for sampling: the square root of the total number of boxes.
2), Sampling requirements: selection The rolls to be inspected are completely randomly selected. The textile factory is required to present the goods packing list to the inspector when at least 80% of the rolls in a batch of cloth have been packed. The inspector will select the rolls to be inspected. Once the inspector selects the rolls to be inspected During the inspection of rolls, no adjustments shall be made to the number of rolls to be inspected or the number of rolls that have been selected for inspection. During the inspection, except for recording and checking the color, no yardage of cloth shall be cut off from any roll. For all rolls subject to inspection Rolls of cloth are graded and defect scores are assessed.
2. Inspection score
1) Calculation of scores In principle, after each roll of cloth has been inspected, it can be The scores obtained are added up. Then the grade is evaluated according to the acceptance level. However, since different cloth envelopes require different acceptance levels, if the following formula is used to calculate the score of each roll of cloth per 100 square yards, and only A specified score under 100 square yards must be formulated to grade different pieces of cloth. A
= (Total Score sysbr”/>Different types of fabrics are divided into the following four categories
Types of fabrics: single roll rating, overall rating, woven fabrics, fully man-made fabrics, polyester/nylon/acetate products Shirt clothing, woven man-made fiber fabrics, worsted wool 2016 denim canvas poplin/Oxford stripe or checkered cotton shirt clothing, woven man-made fiber fabrics, woolen fabrics, striped or plaid pattern cloth/dyed indigo yarn, all special Cloth, jacquard fabric/dobby corduroy/velvet/stretch denim/man-made cloth/blend 2820 linen, muslin linen, muslin 4032 doppioni silk/light silk doppioni silk/light Silk 5040 knitted fabrics all artificial fabrics, polyester/nylon/acetate products rayon, worsted wool, blended silk 2016 all professional fabrics jacquard fabrics/dobby corduroy, spun artificial fiber fabrics, woolen textiles, dyed indigo yarn , velvet/spandex 2520 basic knitted cloth combed cotton/blended cotton cloth 3025 basic knitted cloth carded cotton cloth 4032
A single roll of cloth exceeding the specified score shall be classified as second class Taste. If the average score for the entire lot exceeds the specified score level, the lot shall be deemed to have failed inspection.
3. Inspection score: other considerations for assessing cloth grade
Repeated defects:
1), any Repeated or recurring defects will constitute repeated defects. Repeated defects in each yard of cloth must be penalized with four points. 2) Regardless of the defect score, any roll with more than ten yards of fabric containing repeated defects shall be deemed unqualified.
Full-width defects:
3) Rolls containing more than four full-width defects per 100y2 shall not be rated as first-class products. 4). Rolls containing more than one major defect per 10 linear yards will be deemed unqualified, no matter how many defects are contained in 100y. 5). Rolls containing a major defect within 3y of the cloth end or cloth tail should be assessed as unqualified. Major defects will be considered as three or four point defects. 6) If the cloth has obvious loose or tight threads on one selvedge, or if there are ripples, wrinkles, creases or creases on the main body of the cloth, these conditions will cause the cloth to be uneven when unfolded in the usual way. Such volumes cannot be rated as first-class.
Width of cloth:7) When inspecting a roll of cloth, the width should be at least at the beginning, middle, and end.Completed. This defect may appear as a wavy fabric selvedge or may affect any other area of the fabric. With a spray head, the wrinkles produced are typically eight to ten inches wide.
85. Reed Misdraw – This situation refers to the fact that one or more warp yarns pulled by the reed are opposite to the pattern design. .
86. Reed mark (reference mark defect) – This is a fabric defect caused by a bent reed blade, which is characterized by There is a long, thin stripe running up the warp of the fabric.
87. Reed Streak – This is a warp stripe defect caused by a bad reed. Light or heavy streaks may appear on the fabric due to uneven yarn placement, and a bad reed may wear the yarn and change its dye affinity.
88.Reed defect (Reedy) – This defect is characterized by a reed pattern that usually appears where striped defects occur. The reason for this phenomenon is that the reed is too loose, it may be due to incorrect arrangement of reed traction, or it may be due to incorrect settings of the loom.
89. Rough – This term is often used to describe the rough or wrinkled appearance of fabric caused by broken needles or broken legs. .
90. Sanforize Corrugation (Refer to Sanforize Corrugation) – This fabric defect is caused by the thick padding of the pre-shrinking finishing machine. Washboarding phenomenon caused by normal operation.
91. Sanforize Pucker (refer to Sanforize Pucker) – This fabric defect refers to uneven wetting during the preshrinking process. The meridional deformation produced is generally caused by a bad spray head. This defect may appear as a wavy fabric selvedge or may affect any other area of the fabric. With a spray head, the wrinkles produced are typically eight to ten inches wide.
92. Sanforize Roughness (Sanforize Roughness) – This term is often used to describe the rough or wrinkled appearance of fabrics caused by excessive preshrinking.
