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Table 2 CIE-L*a*b* values and fastness properties of alum-mordanted dyed wool samples

From: Application of Terminalia chebula natural dye on wool fiber—evaluation of color and fastness properties

  Wash fastness Rub fastness Light fastness
Dye % Medium (pH) L* a* b* c* h° K/S c.c. Dry Wet
15 Neutral 54.2 2.6 22.3 22.5 83.3 9.07 4 4 3 4/5
  Acidic 55.8 5.0 19.5 20.1 75.5 4.63 3 4/5 4 4/5
  Alkaline 51.8 4.7 22.3 22.8 77.9 10.43 4 4 3 4/5
8 Neutral 61.9 2.1 23.4 23.5 84.7 5.03 4 4 4 4/5
  Acidic 56.4 4.6 17.9 18.5 75.5 3.65 3/4 4/5 4/5 4/5
  Alkaline 62.6 3.4 23.3 23.5 81.4 4.04 4 4/5 4/5 4/5
3 Neutral 69.6 1.6 22.5 22.6 85.9 2.29 4 4/5 4/5 4/5
  Acidic 62.6 3.4 17.9 18.2 79.0 2.26 4 4/5 4/5 4/5
  Alkaline 70.7 2.5 21.2 21.3 83.2 1.76 3/4 4/5 4/5 4/5
1 Neutral 73.2 1.3 20.6 20.7 86.1 1.46 4 4/5 4/5 4/5
  Acidic 66.8 3.2 18.7 18.9 80.2 1.95 4 4/5 4/5 4/5
  Alkaline 72.9 2.1 20.7 20.8 84.1 1.35 4 4/5 4/5 4/5
0.5 Neutral 73.8 1.3 18.7 18.8 85.9 1.12 4 4/5 4/5 4/5
  Acidic 75.0 1.9 18.2 18.3 83.8 1.02 2 4/5 4/5 4/5
  Alkaline 72.9 2.3 20.1 20.2 83.3 1.25 4 4/5 4/5 4/5
  1. Abbreviations: c.c. color change
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