Verified Mathematical Model & Formulation
Shrinkage (%) = [(Before Wash - After Wash) / Before Wash] × 100 Pattern Adjustment Factor = 100 / (100 - Shrinkage %)
Calculates dimensional relaxation change resulting from wet processing, mechanical tumbling, or steam pressing, providing pattern makers with the exact multiplier needed in CAD software.
Configurable Parameters & Standard Units
- Original Benchmark Length (cm): (Default: 50 cm)
- After-Wash Length (cm): (Default: 47.5 cm)
- Original Benchmark Width (cm): (Default: 50 cm)
- After-Wash Width (cm): (Default: 48 cm)
Standard Worked Example & Practical Verification
Scenario: A 50 cm length square measures 47.0 cm after industrial laundering.
Calculated Solution
6.0% Shrinkage (Enlarge CAD Pattern by 6.38%)
Practical Takeaway: Cut patterns 1.0638 times longer so garments finish at target spec after washing.
Frequently Asked Questions
What is an acceptable fabric shrinkage tolerance?
For knit fabrics, ±5% is standard commercial tolerance. For woven fabrics, ±2% to ±3% is standard after sanforization or garment washing.