Long Staple Flax Fibre Tensile Metrics and Scutcher Loss
Long staple flax tenacity and scutcher loss dictate yarn spinning limits and processing economics, requiring standardized ISO gauge length testing and mill-level mass balance verification.
Relative Humidity Regain
Moisture Balance
Absorption capacity of a fibre as it reaches equilibrium with the surrounding atmospheric moisture. Every relative humidity regain is a critical factor in the commercial grading of linen because it dictates the standard weight of a shipment. Since flax can hold a large amount of water without feeling wet, the industry uses a fixed regain percentage for all trade calculations.
If the actual moisture exceeds this level, the buyer applies a correction factor to the invoice.
Weight Calculation
Determination of the correct invoice mass requires a comparison between the oven-dry weight and the standard regain. The mill uses this figure to ensure that the yarn delivered to the customer matches the weight stated on the packing list. Environmental conditions in the warehouse are monitored to prevent the fibre from absorbing excess moisture from the air.
Operational Impact
Maintaining a stable moisture level is necessary for the smooth operation of the spinning machines. If the relative humidity regain is too low, the yarn loses its elasticity and becomes difficult to weave. Most mills maintain a high humidity level in the spinning room to keep the flax in its most pliable state.
Consistent moisture management is the key to textile quality.