Cellular Breakdown
Microbial digestion of pectin and hemicellulose weakens the molecular structure of plant stems after harvest. Bast fiber degradation happens when moisture levels exceed the equilibrium point, allowing fungi or bacteria to thrive on the internal tissue. This physical separation of the cellulose polymers leads to a reduction in the tensile strength of the individual strands.
Proper retting management restricts the duration of this microbial action to ensure the integrity of the harvest remains sufficient for downstream spinning.
Processing Impact
Excess moisture during warehouse storage creates favorable conditions for unwanted biological activity that compromises raw flax quality. Inspectors verify the state of incoming lots by measuring the flexibility and visual uniformity of the bark layer. When bast fiber degradation proceeds beyond the controlled retting stage, the material loses its elasticity and becomes brittle during mechanical scutching.
Mills reject batches showing signs of rot or discoloration because the weak strands snap under high tension on the drawing frames. Each shipment must arrive with a moisture certification to prevent the development of these hidden structural defects during the journey from the field to the facility.
Acceptance Threshold
Quality control personnel monitor the surface texture and color consistency of linen samples to identify early markers of decay. Acceptance criteria define specific limits for the density of weak spots within a bale, ensuring that the yarn consistency remains stable throughout the knitting process. Buyers adjust their offers based on the presence of mold or dampness that indicates past bast fiber degradation.
Producers mitigate this risk by maintaining strict environmental controls in climate-controlled storage centers. A consistent dry storage environment acts as the primary defense against the biological breakdown of textile raw materials.
