APEO and NPEO Limits What Improves It and What Damages It
Practical actions that raise or lower APEO and NPEO Limits during knitting, dyeing, finishing and garment care.
Actions that help
Correct construction choice and controlled setting improve performance, and they also keep the fabric near usually below 100 ppm. Working figures for APEO and NPEO Limits normally sit around usually below 100 ppm in mainstream production. Note extraction then LC-MS test on the tech pack so nobody tests against an older revision.
Actions that damage it
Excess heat, over-aggressive softener and missing washing-off steps all reduce results. Record elastane content alongside APEO and NPEO Limits, because blends shift the measured value. A result outside usually below 100 ppm usually points to process drift rather than to the fibre itself.
Finishing influence
extraction then LC-MS test results shift noticeably after finishing, so retest after the final process rather than before. Keeping reference values for APEO and NPEO Limits lets suppliers quote without extra sampling rounds. Ask for conditioning details together with extraction then LC-MS test, since both affect the reading.
Garment care influence
Home washing temperature and drying method change performance over the first ten cycles. Working figures for APEO and NPEO Limits normally sit around usually below 100 ppm in mainstream production. Note extraction then LC-MS test on the tech pack so nobody tests against an older revision.
Summary
Keep process settings documented so repeat orders land inside the agreed range every time. Record elastane content alongside APEO and NPEO Limits, because blends shift the measured value. A result outside usually below 100 ppm usually points to process drift rather than to the fibre itself.
