Reconciling Wet Processing Weight Loss against Finished Commercial Invoice Mass in Woven Sourcing
Reconciling woven fabric invoices requires deducting size solids and applying standard moisture regain to oven-dry mass before validating linear yield.
Greige Weight Loss
Processing Measurement
Departure of natural fats, waxes, proteins and sizing agents during scouring and bleaching represents the removal of non-fibrous matter from raw fabric. This greige weight loss occurs as the material moves from its loom-state to a prepared-for-dyeing condition. It identifies the difference between the initial mass of the grey goods and the clean mass after wet processing.
Calculation Logic
Formulas for yield must account for the disappearance of impurities to prevent shortages in the final garment production run. A typical greige weight loss for cotton ranges from four to eight percent depending on the amount of starch applied during weaving. Knowing this figure allows the mill to purchase enough raw fibre to meet the finished weight requirements of the buyer.
Synthetic fibres generally experience much lower reduction because they lack natural oils, though spinning lubricants and knitting oils still contribute a small amount to the total. Every batch is weighed at the start and end of the cleaning cycle to verify these assumptions.
Process Influence
Temperature and chemical concentration in the desizing bath dictate the speed and thoroughness of the extraction. If the greige weight loss is lower than expected, residual size might cause patchy dyeing or a harsh handle. Monitoring the bath effluent provides a secondary check on how much material has been stripped away.
Financial Impact
Costing models incorporate the missing mass as a standard part of the manufacturing waste. Because greige weight loss reduces the billable kilogrammes of a lot, the unit price of the finished fabric must rise to cover the loss of substrate. Precise tracking ensures that the factory does not over-promise on the final yardage.