Optical Solute Measurement
An electronic device detects the concentration of dissolved sugar solids in aqueous solutions by measuring the degree of light deviation as it passes through a liquid sample. Operators use a refractometer brix to quantify sizing agents and chemical additives within the finishing stage of flax processing. Consistency in these liquid mixtures determines the weight and finish quality of the linen cloth before export.
The instrument employs a glass prism to bend light waves at an angle proportional to the total dissolved solids content. Precise readings allow mill technicians to adjust the chemical bath concentrations back toward the target density. Higher solid levels increase the stiffness of the linen fibers, while lower levels produce a softer hand for the final export goods.
This measurement acts as the primary control for chemical bath formulation in the final processing phase.
Process Calibration
Factory standards dictate that every batch of finishing solution requires verification before application to the woven flax goods. Technicians calibrate the refractometer brix using distilled water to establish a zero baseline on the scale. Air bubbles or improper lens cleaning introduce error into the recorded values, so frequent inspection of the optical surface remains mandatory for accuracy.
A deviation from the internal mill specification triggers an immediate halt in the saturating rollers. Workers then add pure water or concentrated sizing agents to restore the required density. Standard practice requires these adjustments to occur in small increments to prevent excessive oscillation in the solution makeup.
Documented records of these adjustments provide the necessary evidence for quality auditors to verify that each yard of fabric meets the agreed density parameters.
Acceptance Threshold
Contracts between the mill and the buyer define the expected rigidity of the final linen product based on specific solid weight limits. A shipment fails the acceptance criteria if the recorded brix levels during the finishing phase fall outside the agreed percentage range. Fabric grade depends on these precise liquid controls, whereas raw fibre grade rests on mechanical properties like tenacity and length.
The data stored in the production logbook confirms whether the mill maintained the target saturation throughout the entire finishing run. Precise optical control ensures that every roll matches the specified finish profile.
