Determining Customs Tariff Classification for Unspun Flax and Woven Fabrics
Customs tariff classification for flax requires precise verification of mechanical processing state, yarn twist insertion, and quantitative dry fiber mass composition.
Official Regain 12 Percent
Moisture Standard
The weight adjustment factor designates the mass of water allowed within a shipment of raw flax fibre when trading between primary processors and spinning mills. Official regain 12 percent represents the fixed reference point for calculating the clean dry weight of a lot to prevent payment for excess moisture content. Buyers subtract the actual moisture reading from the gross weight and apply this fixed constant to reach a billable mass.
The calculation protects both parties by ensuring pricing rests on the actual fibre substance rather than liquid weight.
Calculation Protocol
Mills arrive at the dry mass by multiplying the gross arrival weight by the dry matter ratio determined through laboratory oven testing. Engineers place a sample in a drying chamber until the mass stops changing and record the difference from the original weight to establish a baseline percentage. Division of the dried mass by the standard value provides the adjusted weight for payment.
High accuracy in these measurements remains necessary because small variances in moisture levels translate to significant price shifts across bulk shipments.
Commercial Impact
Final invoices rely on this value to normalize costs when humidity fluctuations affect fibre density during transit. Cargo stored in damp conditions gains mass through natural absorption while dry environments cause evaporation losses that alter the weight profile. Processors verify the load against the fixed standard to confirm that the supplier met the agreed contractual limit.
The application of this threshold establishes a common financial baseline that survives variation in storage and transport conditions.