Determining Flax Staple Profile Using Manual Comb Sorting
Manual comb sorting by ISO 2370 isolates technical flax bundle length profiles to prevent drafting waves, control short fibre content, and enforce purchase contracts.
Raw Material Yield Arithmetic
Mass Balancing
Quantitative efficiency formula tracks the transition of raw scutched flax into finished hackled line or tow yarn through successive production steps. Applying the raw material yield arithmetic gives mill managers the percentage of usable spun fiber obtained from the initial dry bale weight. This calculation governs the material planning and financial costings of the spinning plant.
Calculation Step
Evaluating this efficiency requires precise measurements of raw flax inputs against the outputs of sliver and finished yarn. The math subtracts the weight of shives, short-fiber waste, and moisture loss from the incoming bale weight, dividing the result by the initial weight to find the yield. For example, starting with a one-ton bale of scutched flax, the process of hackling and drawing might yield six hundred kilograms of spun yarn, representing a sixty percent yield.
Mill supervisors perform this raw material yield arithmetic weekly to identify shifts in fiber quality or machinery malfunctions.
Industrial Benchmark
Purchase agreements use these yield calculations to adjust the pricing of flax shipments from different growing regions. Higher yields justify a premium price because they reduce the cost of fiber prep and waste handling. Mill buyers track these metrics over time to evaluate the quality of specific farming cooperatives.