for measuring on...
The ColorTector Alpha® compares the color difference between the sample and the measured subject. Output CIE_Lab 3 groups data, and the 4 groups of ΔE, ΔL, Δa, Δb after comparison.
ΔE: total color difference
ΔL+: partial white
ΔL-: partial black (comparison with proto type)
Δa+: partial red
Δa-: partial green (comparison with proto type)
Δb+: partial yellow
Δb-: partial blue (comparison with proto type)
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