Color Phenomenon
Visual discrepancy in the perceived color of two fabric samples under different lighting conditions represents a major challenge in garment assembly. When evaluated under shade metamerism illuminant d65, two fabrics that matched perfectly under store lighting may appear as different colours. This phenomenon occurs because the dyes used in the different fabrics have different light reflectance curves.
The shade match is only valid for the specified light source.
Dye Selection
Formulating dye recipes with identical spectral reflectance curves represents the most effective way to eliminate this color matching issue. Dyehouses must select dyestuffs with similar chemical structures and absorption spectra to ensure the color remains consistent across different environments. This selection process requires advanced color matching software that simulates the appearance under various light sources.
Poor dye selection always leads to customer rejection.
Visual Assessment
Standardized light boxes are used to examine the dyed fabric under different bulbs simulating daylight, incandescent and fluorescent sources. The technician must compare the fabric roll to the master standard from multiple angles to identify any shifts in color. This visual check is crucial for multi-panel garments like jackets.
Industrial Standard
Automated spectrophotometers measure the color difference under different illuminants and calculate the metamerism index. An index value of less than zero point five is required for high-quality production. This objective measurement provides the numerical baseline for commercial color acceptance.
