Courses per Inch (CPI) Test Methods and Acceptable Limits
Courses per Inch (CPI) is verified through knitting machine setting. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
knitting machine setting defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Courses per Inch (CPI) normally sit around 28-46 depending on gauge in mainstream production. Note knitting machine setting on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; 28-46 depending on gauge is only meaningful for similar fabrics. Record elastane content alongside Courses per Inch (CPI), because blends shift the measured value. A result outside 28-46 depending on gauge usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write 28-46 depending on gauge with a stated tolerance, then verify against knitting machine setting. Keeping reference values for Courses per Inch (CPI) lets suppliers quote without extra sampling rounds. Ask for conditioning details together with knitting machine setting, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Courses per Inch (CPI) normally sit around 28-46 depending on gauge in mainstream production. Note knitting machine setting on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Courses per Inch (CPI), because blends shift the measured value. A result outside 28-46 depending on gauge usually points to process drift rather than to the fibre itself.
