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 |
N.B.:
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.
Grading:
1. Linear Yard basis:
Acceptable tolerance=20 points per 100 linear yards
2. Square yard basis:
Points/100 sq. yd= Total Points scored in the bulk X 100 X 36
Width of the roll(inch) X total yds inspected
Acceptable tolerance:
a. 28 points per 100 sq. yd. for each individual roll.
b. 20 points per 100 sq.yd. for average of rolls inspected.
1st Quality: Penalty points not exceed the acceptable tolerance.
2nd Quality: Penalty points exceed the acceptable tolerance. |
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