Standard Setup Rules for Four Point Greige Perches
Standard four-point greige perches require a 45-60 degree tilt, 1200+ lux D65 lighting, synchronized tension drive, and strict ASTM D5430 demerit point scoring.
First Quality Ceiling
Defect Threshold
The maximum allowable penalty points per hundred square meters determines whether a roll of woven linen can be sold as premium grade. This first quality ceiling establishes a strict barrier that prevents sub-standard cloth from being delivered to high-end apparel brands. If the accumulated flaws exceed this limit, the roll is automatically reclassified.
This threshold maintains the value of the mill’s premier brand.
Grading Methodology
Inspectors record every slub, warp float, and dye spot on the fabric inspection sheet as the linen rolls through the viewing station. They calculate the total points using a standard system such as the four-point method, where longer defects receive higher penalties. To remain below the first quality ceiling, the roll must exhibit very few major faults.
The final tally is stamped directly onto the roll certificate to verify its quality classification.
Contractual Enforcement
Buyers enforce this limit to ensure that the linen they receive can be cut and sewn without excessive waste or panel rejection. If a delivered batch is found to violate the first quality ceiling during incoming inspection, the buyer has the right to return the shipment or demand a price adjustment. The mill utilizes this grading system to resolve disputes and maintain trust with international trading partners.
By keeping defective yarn off the looms and optimizing mechanical settings, the mill ensures that the majority of its output meets this high-quality standard. This disciplined monitoring protects both the mill’s profit margin and its market reputation.