Determining Non Preferential Origin Criteria for Imported Woven Linen Fabric
Non-preferential origin for woven linen fabric assigns strictly to the country where yarn is woven into greige cloth on industrial looms under tariff shift rules.
Piece Dyeing
Finishing Method
Colouration processes applied to an entire length of woven fabric occur after the weaving is finished rather than at the yarn stage. Utilizing piece dyeing allows mill managers to maintain large stocks of grey goods and only apply the final colour once a buyer places an order. This flexibility reduces the financial risk of holding pre-coloured yarn that might fall out of fashion.
Chemical Sequence
Large vats hold the fabric in a continuous loop while heated dye liquor circulates through the fibres under pressure. During piece dyeing, the cloth must be kept at a constant tension to prevent streaks or uneven distribution of the pigments. After the soaking period, the fabric is rinsed and dried using stenter frames that pull the material to its final width.
Outcome Variance
Saturation levels tend to be very high, but deep penetration into the core of tight flax threads can be more difficult than with yarn-dyed material. One advantage of piece dyeing is the smooth and level finish it creates across a vast surface of linen intended for high end apparel. Because the entire roll passes through the dye at once, the colour consistency from start to finish is excellent.