Optical projection overestimates non-circular bast fibre diameter by projecting major axes; ISO 2370 gravimetric factor calibration restores metric accuracy.
Asian spinning transforms certified European flax into local yarn for customs while retaining material pedigree through transaction dockets.
Gravimetric flax fineness testing measures cut bundle mass to determine exact linear density in tex, fixing spinnable yarn count and trade valuation.
Elementary cell cross-sectional area population distributions predict wet-spinning breakage limits far more accurately than standard gravimetric tex averages.
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