Cover Stitch Setting It Correctly on a Tech Pack
Cover Stitch should be written into the tech pack with a value, a tolerance and a method. This removes ambiguity from quotations.
Definition to agree
elastic cover stitch for hems. Working figures for Cover Stitch normally sit around two or three needle versions in mainstream production. Note cover stitch machines on the tech pack so nobody tests against an older revision.
Target value
Open the specification at two or three needle versions, adjusted to the end use. Record elastane content alongside Cover Stitch, because blends shift the measured value. A result outside two or three needle versions usually points to process drift rather than to the fibre itself.
Method line
Always pair the target with cover stitch machines so the mill and the laboratory test the same way. Keeping reference values for Cover Stitch lets suppliers quote without extra sampling rounds. Ask for conditioning details together with cover stitch machines, since both affect the reading.
Tolerance line
State plus or minus limits to keep production realistic while protecting the requirement. Working figures for Cover Stitch normally sit around two or three needle versions in mainstream production. Note cover stitch machines on the tech pack so nobody tests against an older revision.
Approval step
Approve the result on pre-production bulk rather than on development fabric only. Record elastane content alongside Cover Stitch, because blends shift the measured value. A result outside two or three needle versions usually points to process drift rather than to the fibre itself.
