Roll-to-Roll Consistency Setting It Correctly on a Tech Pack
Roll-to-Roll Consistency should be written into the tech pack with a value, a tolerance and a method. This removes ambiguity from quotations.
Definition to agree
variation between rolls in one lot. Working figures for Roll-to-Roll Consistency normally sit around same lot should match within tolerance in mainstream production. Note shade continuity inspection on the tech pack so nobody tests against an older revision.
Target value
Open the specification at same lot should match within tolerance, adjusted to the end use. Record elastane content alongside Roll-to-Roll Consistency, because blends shift the measured value. A result outside same lot should match within tolerance usually points to process drift rather than to the fibre itself.
Method line
Always pair the target with shade continuity inspection so the mill and the laboratory test the same way. Keeping reference values for Roll-to-Roll Consistency lets suppliers quote without extra sampling rounds. Ask for conditioning details together with shade continuity inspection, since both affect the reading.
Tolerance line
State plus or minus limits to keep production realistic while protecting the requirement. Working figures for Roll-to-Roll Consistency normally sit around same lot should match within tolerance in mainstream production. Note shade continuity inspection 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 Roll-to-Roll Consistency, because blends shift the measured value. A result outside same lot should match within tolerance usually points to process drift rather than to the fibre itself.
