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.
Flax Slub Grading
Assessment Standard
Raw linen quality measurement assigns specific numerical values to irregularities found along the length of individual strands. Flax slub grading provides the quantitative framework for evaluating these thickened segments during the initial post-retting phase of fibre production. Technicians utilize optical scanners to identify departures from nominal strand thickness, which allows mills to categorize the fibre batch for appropriate spinning machinery settings.
This data entry creates the baseline record for subsequent production stages.
Production Logic
Processing equipment requires consistent input parameters to maintain tension across the spinning frame. A high frequency of these irregularities forces a reduction in throughput speed to prevent snapping, whereas a lower count permits higher operational velocity. Mills often maintain internal benchmarks for slub frequency that differ from the external requirements set by overseas buyers.
Discrepancies between internal mill assessments and external specifications usually dictate whether a batch undergoes additional mechanical cleaning or remains allocated for coarser textile applications.
Inspection Protocol
Digital sensors capture the variance in light transmission as bundles pass along the conveyor, producing a graphical representation of diameter fluctuations over a defined distance. Software algorithms translate this optical feedback into a standardized report that stays attached to the raw lot throughout the cleaning and combing phases. These reports remain accessible for audit purposes to confirm that the output meets the density requirements for the designated final product.
Every variance detected during this inspection defines the commercial value of the raw fibre lot before it enters the spinning mill.