Fabric Growth Setting It Correctly on a Tech Pack
Fabric Growth should be written into the tech pack with a value, a tolerance and a method. This removes ambiguity from quotations.
Definition to agree
permanent elongation left after extension. Working figures for Fabric Growth normally sit around below 6% target in mainstream production. Note ASTM D2594 stretch properties on the tech pack so nobody tests against an older revision.
Target value
Open the specification at below 6% target, adjusted to the end use. Record elastane content alongside Fabric Growth, because blends shift the measured value. A result outside below 6% target usually points to process drift rather than to the fibre itself.
Method line
Always pair the target with ASTM D2594 stretch properties so the mill and the laboratory test the same way. Keeping reference values for Fabric Growth lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ASTM D2594 stretch properties, since both affect the reading.
Tolerance line
State plus or minus limits to keep production realistic while protecting the requirement. Working figures for Fabric Growth normally sit around below 6% target in mainstream production. Note ASTM D2594 stretch properties 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 Fabric Growth, because blends shift the measured value. A result outside below 6% target usually points to process drift rather than to the fibre itself.
