Lycra T400 Quality Control: The Defects Buyers Reject Most
Quality defects around Lycra T400 cause most claims, and knowing the common ones in advance keeps inspection simple.
Defect one: shade variation
Visible differences within an order remain the top complaint. Checking shade under standard light before cutting avoids most cases. Buyers usually ask for 40-70 denier printed on the technical data sheet before sampling starts. Evidence for stretch without the heat sensitivity of spandex is easier to compare when every supplier quotes against the same method.
Defect two: hand feel drift
Fabric that changes handle between lots usually indicates a finishing bath difference rather than a yarn change. Development lots should be tested next to bulk lots, since results drift between them. Documentation for Lycra T400 normally covers 40-70 denier along with the certificate reference.
Defect three: dimensional instability
Size drifting outside 40-70 denier usually starts at the stenter, where temperature and overfeed were not matched to the construction. For denim-like and firm knits, written measurements help avoid disputes once the shipment arrives. Buyers usually ask for 40-70 denier printed on the technical data sheet before sampling starts.
Defect four: surface faults
Barré, snagging and oil spots account for a large share of cutting room waste in denim-like and firm knits. Evidence for stretch without the heat sensitivity of spandex is easier to compare when every supplier quotes against the same method. Development lots should be tested next to bulk lots, since results drift between them.
Inspection practice that works
Inspect to an agreed 4-point system, record photographs, and look again after one home wash since several faults only appear then. Documentation for Lycra T400 normally covers 40-70 denier along with the certificate reference. For denim-like and firm knits, written measurements help avoid disputes once the shipment arrives.
