Warp Beam Tension Balancing in High Gauge Tricot Knitting
Balancing high gauge tricot warp beam tension within narrow cN per tex bands eliminates fabric weight drift and dynamic horizontal streak defects across bulk runs.
Four Point Inspection Defect
Grading Criteria
Numerical penalties assigned to fabric flaws determine the commercial viability of a textile roll according to the ASTM D5430 standard. A four point inspection defect is categorized by its length or size, with longer flaws attracting higher point values up to a maximum of four. Inspectors calculate the total points per hundred square yards to decide if a batch is first or second quality.
Scoring Logic
Minor imperfections under three inches receive a single point while those exceeding nine inches receive the full four. Every four point inspection defect is logged during the visual check on a backlit table. These points accumulate across the width and length of the roll to provide a standardized measure of damage.
Acceptance Threshold
Buyers typically set a limit such as 40 points per hundred square yards for premium apparel orders. Any roll containing a four point inspection defect that covers more than half the width is usually rejected regardless of the total count. Clear documentation of these faults allows for price negotiations or claims against the mill.
Practical Application
Consistent scoring requires trained staff who can identify subtle errors like barre or oil spots. Tracking every four point inspection defect helps a factory understand where process failures occur in the loom or dye vat.