Quantifying Mass Yield Loss in Long Line Flax Wet Spinning
Wet spinning long line flax generates 35 to 40 percent mass yield loss from hackling shive ejection, hydrothermal pectin extraction, and ring frame waste.
ISO 2370 Conditioned Mass
Standardized Calculation
Mathematical determination procedures defined under international textile standards calculate the commercial invoice weight of flax fiber consignments by combining dried fiber mass with official moisture allowances. The iso 2370 conditioned mass establishes a fair financial settlement basis that eliminates invoice discrepancies caused by natural moisture absorption during oceanic transport and warehousing. The procedure applies globally to scutched flax, hackled line flax, and processed tow traded between international suppliers and spinning mills.
The standard ceases to govern downstream operations once fibers enter chemical processing, roving preparation, or spinning frame water troughs.
Desiccation Sequence
Gravimetric analysis begins by extracting representative test samples from sealed moisture-proof extraction cans collected across random delivery bales. Technicians record the initial gross mass of the sampled fiber immediately upon opening containers in the conditioning laboratory. Test specimens are placed into ventilated drying ovens operating at one hundred and five degrees Celsius with continuous forced air circulation.
Drying continues until successive weighings conducted at fifteen-minute intervals show no mass variation greater than zero point zero five percent, confirming complete bone-dry status. The official moisture regain percentage of twelve percent, established by international agreement for raw and hackled flax, is added mathematically to the oven-dry mass. If raw flax bales contain non-fibrous foreign matter or packaging tare, these masses are deducted prior to executing the final moisture regain calculation.
The calculated mass value establishes the definitive legal figure used by commercial finance departments to validate customs clearance invoices and settle letters of credit.
Commercial Impact
Financial settlements resolve maritime shipping variances using the verified figures generated under the desiccation testing sequence. Importers reject supplier claims for atmospheric weight increases when test certificates demonstrate that delivered moisture exceeds the standard limits established by iso 2370 conditioned mass.