Color Difference Issues in Webbing Production

Color difference in webbing is a common quality pain point. Types named: inter-batch variation between dye vats; intra-batch end-to-end or sectional difference; side-to-center on wide tape; face-to-back on plain or rib weaves; storage or aging yellowing.

Causes named: yarn lot and whiteness; dye-vat temperature, time and pH; weighing errors; uneven flow in overflow or jet machines; weaving tension and density; finishing (softeners, water-repellent, excessive heat-setting); metamerism under different light sources.

Prevention named for the order stage: seal a lab dip or salesman sample; write a ∆E window (the article cites typical ∆E ≤ 0.8–1.0 for light shades and ≤ 1.0–1.5 for dark); name the light source (D65 / TL84 / CWF).