Gravimetric Testing Basics for Hackled Line Flax Sliver
Gravimetric testing determines hackled flax sliver dry mass, moisture regain, and linear density to lock in fair commercial yarn pricing.
Dry Clean Yield
Retained Mass
Material recovery after organic solvent treatment is a performance parameter used to evaluate linen fabrics intended for premium garments. In fabric grading and quality assurance, dry clean yield measures the percentage of fabric weight or dimensions retained after standard chemical cleaning. The resulting percentage is documented on the final export certificate to confirm that the finished linen will not shrink or lose density during consumer care.
Solvent Resistance
Finished woven fabrics undergo laboratory cleaning trials using perchloroethylene to simulate commercial laundry processes. Mill technicians measure the sample weight before and after the washing cycle, recording the difference to determine the dry clean yield of the specific fabric run. When resins or softeners applied during the finishing stage are partially dissolved by solvents, the yield drops, showing that the finishing treatment is unstable.
This loss alters the hand and weight of the linen, making it unacceptable for high-end tailoring. To prevent this, the mill modifies the curing temperature or curing duration to bind the finishing agents securely to the flax fibres.
Quality Standard
Discrepancy in this measurement often occurs when chemical binders fail to polymerise correctly on the flax cellulose. Buyers use these test reports to verify that the imported linen matches the agreed specifications for dimensional stability. Lower recovery values lead to immediate batch rejection before export.