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Table 1 Suggested interpretation of ΔE values

From: Study on the color levelness of silk fabric dyed with vegetable dyes

ΔE value Visual appearance of levelness Extent of unlevelness
≤0.20 Excellent levelness Unlevelness not detectable
0.21–0.50 Good levelness Unlevelness noticeable under close examination
0.51–1.0 Poor levelness Apparent unlevelness
>1.0 Bad levelness Conspicuous unlevelness