Greige Thread Density Influence on Wet Fabric Relaxation
Greige thread density limits wet fabric relaxation by establishing inter-yarn friction boundaries that block yarn swelling and crimp interchange during finishing.
Iso 5077 Shrinkage Test
Dimensional Standard
International test protocols mandate standardized washing and drying procedures to quantify dimensional alterations in textile fabrics. Laboratory technicians apply the ISO 5077 shrinkage test to measure dimensional changes resulting from domestic laundering treatments. The protocol stops applying to dry-clean-only fabrics or industrial textiles subjected to steam pressing routines.
Test Procedure
Fabric specimens undergo conditioning in standard atmosphere prior to marking precise benchmark distances along warp and weft directions. Washing machines execute specified washing cycles, followed by flat drying or tumble drying according to specimen care instructions. Laboratory analysts perform the ISO 5077 shrinkage test by remeasuring benchmark distances after conditioning the laundered samples.
Calculation of percentage change reveals linear contraction or expansion in both fabric directions.
Specimen Evaluation
Benchmarks drawn parallel to length and width directions dictate precise measurement axes. Distance reductions indicate fabric contraction, while distance increases reveal growth caused by relaxation of structural stresses.
Production Compliance
Fabric buyers set strict percentage limits for post-wash dimensional movement in commercial purchase contracts. Garment manufacturers utilize test results to adjust pattern sizing and offset anticipated laundering contraction. Mill quality teams run the ISO 5077 shrinkage test across batch lots to verify that stenter heat setting and compressive shrinking treatments meet buyer limits.
Excessive dimensional change triggers lot rejection before fabric cutting begins.