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ASTM D5430 4-Point System

Defect Demerit Point
Length of defect Demerit Points
3 inches or less 1
Over 3 inches but not over 6 inches 2
Over 6 inches but not over 9 inches 3
Over 9 inches 4


1. No running yard shall be penalized more than 4 points for warp and weft defects.
2. For fabric width exceeding 64"-66", maximum penalty points can be increased above 4 per linear yard
    in proportion to the width.
3. Defects appearing within one inch of either edge shall be disregarded.
4. Any hole other than a pin hole shall be considered a major defect and assigned 4 points for penalty.


1. Linear Yard basis: Acceptable tolerance = 20 points per 100 linear yards.
2. Square yard basis: Total defect points per 100 square yards of fabric = (Total defect points in the roll x
    36 inches per yard x 100 yards) / (Fabric width in inch x fabric length in yards).

Acceptable Tolerance

1. 28 points per 100 square yards for each individual roll.
2. 20 points per 100 square yards for average of rolls inspected.

1st Quality: penalty points not exceed the acceptable tolerance.
2nd Quality: penalty points exceed the acceptable tolerance.