Uncertainty of Colour Measurement in Textile Testing
topic
Colour measurement uncertainty in textile spectrophotometry combines contributions from instrument repeatability, wavelength scale accuracy, photometric linearity, specimen presentation geometry, observer metamerism, and illuminant specification, propagating through tristimulus integration and colour difference formula calculation to yield expanded uncertainty in CIELAB coordinates and delta-E values.
Role
Enables pass-fail decisions on textile colour against specified tolerances to be made with knowledge of the total colour measurement uncertainty, preventing the specification of colour tolerances tighter than the measurement system can reliably discriminate and supporting objective resolution of colour disputes between suppliers and buyers.
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