Standard Testing Methods for Determining Woven Fabric Linear Density
Standard woven linear density testing reconciles cloth mass per linear metre with desized, straightened yarn tex under controlled humidity.
Crimp Removal
Fiber Extraction
Mechanical tension applied during initial processing straightens irregular plant filaments to prepare them for subsequent stages of textile manufacture. Crimp removal occurs precisely at the decortication line where harsh beating heads pull raw stems apart to release natural bast bundles. Mill operators grade the cleaned strands by measuring linear density and breaking length against specific contractual thresholds agreed upon before harvest.
Heavy draw frames stretch damp filaments past their elastic recovery point so that permanent elongation sets in prior to roving operations.
Cloth Density
Woven fabric production requires uniform yarn geometry to ensure proper cover factor and predictable shrinkage during subsequent chemical bleaching. Crimp removal takes place inside the sizing bath where wet warp threads pass under weighted immersion rollers under strict tension control. Inspectors record residual elongation percentages on daily quality control dockets to verify compliance with export performance standards.
High tension settings prevent the formation of loose loops that would otherwise cause broken filaments on high speed shuttleless looms.
Buyer Acceptance
Finished linen goods undergo rigorous tensile testing in independent laboratories to confirm that dimensional stability meets international commercial specifications. Crimp removal evaluation forms the core protocol for determining whether a manufactured batch qualifies for premium retail distribution or discount industrial end use. Final inspection certificates list elongation recovery data alongside tear resistance metrics to provide a complete picture of fabric durability under stress.
Permanent straightening reduces the risk of skewed seams and asymmetrical drape after repeated industrial laundering cycles.
Standard Laboratory Methods for Flax Yarn Linear Density Determination
Standard flax yarn linear density determination mandates motorized skein reeling under 0.5 cN/tex tension combined with ISO 6741 oven-dry commercial mass correction.