Moisture Regain ISO 6741

Standardized Procedure

Testing protocols determine the commercial mass of a textile shipment by accounting for its natural water content. Testing for moisture regain iso 6741 involves drying a sample of flax or yarn to a constant weight and then calculating the percentage of moisture it would hold under standard atmospheric conditions. This measurement is critical because linen can absorb up to twenty percent of its weight in water, which significantly affects its price.

Commercial Weight

Calculation of the invoice amount depends on the difference between the actual weight of the bales and their oven-dry weight plus the official regain allowance. When a seller applies moisture regain iso 6741, they ensure that the buyer is paying for the actual fibre and not for water absorbed during transit or storage. This prevents financial losses for both parties due to changes in humidity.

It is the standard method for settling disputes over shipment weights in the international flax trade.

Laboratory Precision

Execution of the test requires precise scales and temperature controlled ovens. Because flax is highly sensitive to moisture, the technician must handle the samples quickly to prevent any change in weight before the final reading. This data is recorded on the quality certificate accompanying the yarn.

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