Mass Adjustment
Mathematical constants used to account for the loss of fibre mass during chemical dissolution define this specific coefficient. Technicians apply correction factor d when performing quantitative analysis on fibre blends containing wool or silk. Values for this adjustment compensate for the small amount of the insoluble component that dissolves despite the selective nature of the reagent.
Standardized tables in ISO 1833 provide the specific numerical values required for accurate calculation.
Calculation Accuracy
Laboratory results require this multiplier to ensure the reported percentage of each fibre reflects the true original composition. Without the adjustment, the percentage of the remaining fibre appears lower than the actual amount present in the fabric. A factor of 1.00 indicates no loss, while values like 1.01 or 1.03 represent various levels of degradation.
Method Validation
Precise determination of this variable involves testing pure samples of the fibre under identical conditions to those used for the blend. Since different mills may produce fibres with varying levels of surface treatment, the standard factor occasionally needs verification against the specific material in question. Accurate mass measurement before and after the chemical bath remains the foundation of the process.
Reporting Precision
Final certificates must state whether the result includes the adjustment for mass loss. Trade partners rely on these corrected figures to verify that a product meets legal labelling requirements. Discrepancies in this calculation lead to false claims regarding the luxury content of a textile.
