Colorimetric Determination
Leather quality assessment relies on the measurement of light reflection to quantify shade consistency across finished hides. The din en iso 17131 procedure provides a standardized method for evaluating color differences in leather using specific spectrophotometric instrumentation. This protocol defines how light interacts with grain surfaces to produce spectral data that distinguishes between color batches.
It establishes the physical boundary for measurement by focusing on the diffuse reflectance of surfaces under specified light sources.
Instrumental Configuration
Standardization of illumination geometries allows for comparison of results between different tanning facilities. The din en iso 17131 standard requires consistent viewing angles and light scattering detection to eliminate variables arising from grain texture or surface finish. These parameters prevent false readings that occur when observers vary in their visual assessment of light absorption and reflection.
Data Interpretation
Quantitative values from these measurements provide the basis for pass or fail decisions in commercial leather procurement. Analysts process the spectral reflectance curves generated by din en iso 17131 to calculate color space coordinates. Deviation beyond agreed tolerances signals a requirement for re-dyeing or shade matching adjustments.
Calibration Requirements
Accuracy in spectrophotometric evaluation depends on the periodic verification of the hardware against ceramic tiles or white standards. Proper maintenance of the aperture size and light source stability ensures the data remains reliable during the production of large volumes of leather. The system maintains measurement integrity through the consistent application of these optical protocols.
