Laden...
Laden...
A spectrophotometer approves the color, but your eye sees a difference. Why that happens — metamerism, spot measurement, Delta E — and which decision rule to use.
You agree on color with a supplier not with words but with L*a*b* and ΔE. This is how you record color, tolerance and measurement conditions unambiguously — and avoid surprises at delivery.
How large can a color difference be before a product is rejected? Why tolerances depend on the product, material, and market — and how to establish them.
Color difference formulas objectively quantify the difference between two colors. Discover the main formulas - CIE76, CMC, CIE94, and CIEDE2000 - their strengths and when to use which formula.
In CIELAB, the difference between two colors is described as the distance between their coordinates. Learn how ΔE*ab is calculated, what ΔL*, Δa*, and Δb* mean, and why modern formulas like ΔE00 are needed.
Accurate color measurements do not happen by accident, but through standardized procedures, technical knowledge, and qualified operators. Learn the 13 essential guidelines for consistent and reproducible color measurements.