How to test the quality of a piece of fabric, this article explains it very clearly - Flame retardant fabric_Flame retardant fabric_Cotton flame retardant fabric_Flame retardant fabric information platform

Different types of cloth are divided into four major categories: over A single roll of cloth with a specified score shall be classified as second-class. If the average score for the entire lot exceeds the specified score level, the lot shall be deemed to have failed inspection.

Calculation of scores: In principle, after each roll of fabric has been inspected, the scores obtained can be 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, it only needs to formulate a score per 100 square yards. The specified score under the code can be used to evaluate the grade of different cloth seals.

(total scorex36x100)/(number of tested codesx Width of cloth that can be cut) = fraction per 100 square yards

Different types of cloth are divided into four categories: single rolls exceeding a specified score should be classified as second-class. If the average score for the entire lot exceeds the specified score level, the lot shall be deemed to have failed inspection.

Woven cloth type cloth type single roll whole batch

All artificial cloth, polyester/nylon/acetate products, shirt clothing, spun artificial fiber fabrics Spun wool 20 points/100 square yards 16 points/100 square yards
Denim canvas poplin/Oxford striped or checkered cotton shirt clothing spun man-made fiber fabric wool fabric striped or plaid pattern cloth/dyed indigo yarn all special cloths, jacquard fabrics/more Than corduroy/velvet/stretch denim/man-made fabric/blend 28 points/100 square yards 20 points/100 square yards
Linen muslin 40 points/100 square yards 32 points/100 square yards
Doppioni silk/light silk 50 points/100 square yards 40 points/100 square yards

Knitted cloth type cloth type single roll whole batch

Full artificial fabric, polyester/nylon/acetate products rayon worsted wool blended silk 20 points/100 square yards 16 points/100 square yards
Full professional fabrics, jacquard fabrics/dobby corduroy spun man-made fiber fabrics woolen spun Fabric dyed indigo yarn velvet/spandex 25 points/100 square yards 20 points/100 square yards
Basic knitted fabric (combed cotton/blend cotton) 30 points/100 square yards 25 points/100 square yards
Basic knitted fabric (carded cotton) 40 points/100 square yards 32 points/100 square yards

Sampling procedure: The selection of papers to be inspected is completely random. Textile mills are required to present cargo packing slips to inspectors 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, no 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 for recording and checking colors. All rolls of fabric inspected are graded and defect scores are assessed.

Repeated offenders Defects:

1. Any repeated and/or recurring defect will constitute a repeat defect. Four points will be awarded for each yard of fabric.

2. No matter what the defect score is, any piece of cloth with more than ten yards Papers containing repeated defects shall be deemed unsatisfactory.

Full width defects ：

3. Rolls containing more than four full-width defects per 100 square yards shall not be Rated as first-class.

4. A roll containing more than one major defect per 10 linear yards will be deemed unqualified, regardless of how many defects are contained in 100 yards.

5. in Rolls containing a major flaw in the first or last three digits shall be deemed unqualified. Major defects will be considered as three or four point defects.

6. If the cloth has obvious loose or tight lines on one selvedge, or ripples, wrinkles, creases or creases on the main body of the cloth, these conditions will cause the cloth to be unfolded in the normal way. , the cloth is uneven, and such rolls cannot be rated as first-class.

Cloth width:

7. Check When taking a roll of fabric, check its width at least three times at the beginning, middle, and end. If the width of a roll of fabric is close to the specified minimum width or the width of the fabric is uneven, then the number of inspections of the width of the roll must be increased.

8. If the roll width is less than the specified minimum purchase width, the roll will be deemed unqualified.

9. For woven fabrics, if the width is 1 wider than the specified purchasing width inches, the volume will be deemed unsatisfactory. However, for elastic woven fabrics, even if they are 2 inches wider than the specified width, they can still be qualified. For knitted fabrics, if the width is 2 inches wider than the specified purchase width, the roll will be deemed unqualified. However, for stretch knitted fabrics, even if it is 3 inches wider than the specified width, it can still be determined as qualified.

10. Cloth The overall width of is the distance from the outer selvedge at one end to the outer selvage at the other end. The width of a piece of fabric that can be cut is the width measured excluding the selvage and/or stitching machine pinholes, and the undyed, uncoated or otherwise untreated surface portion of the main body of the fabric.

Color difference assessment:

11. The color difference between rolls and rolls and batches should not be less than Four levels in the AATCC gray scale.

12. in During the cloth inspection process, a 6-inch to 10-inch wide color difference cloth board is taken from each roll. The inspector will use these cloth skins to compare the color difference within the same roll or the color difference between different rolls.

13.Same The color difference from edge to edge, edge to center, or end to end of the roll shall not be lower than level four in the AATCC gray scale. For each roll inspected, each yard of fabric showing such chromatic defects will be rated four points.

14. If the fabric under inspection does not match the approved sample provided in advance, the color difference must be lower than 4-5 levels in the gray scale, otherwise the batch of goods will be deemed unqualified.

Wrap length:

15. If If the actual length of the roll deviates by more than 2% from the length indicated on the label, the roll will be deemed unqualified. Rolls with roll length deviations will no longer be evaluated for defect scores, but must be noted on the inspection report.

16. If the total length of all random inspection samples deviates from the length indicated on the label by 1% or more, The entire shipment will be deemed unqualified

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