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International Journal of Interdisciplinary Research

Table 4 Two-sample t test results of mordant type for colorfastness to light and laundering on dyed wool yarn: colorfastness is indicated in terms of color difference ΔE of samples before and after light or laundering exposure

From: Black walnut, Osage orange and eastern redcedar sawmill waste as natural dyes: effect of aluminum mordant on color parameters

  Nonmordanted Mordanted t value
M SD M SD
Exposure to light
Black walnut 5.17 1.31 3.95 1.25 2.01*
Osage orange 12.52 1.14 11.70 1.35 1.38
Eastern redcedar 6.51 0.72 5.72 0.95 1.99*
Exposure to laundering
Black walnut 2.56 0.71 4.61 0.50 −7.09***
Osage orange 5.57 0.57 4.26 1.07 3.25**
Eastern redcedar 2.35 0.70 3.83 0.60 −4.80***
  1. * p < 0.05
  2. ** p < 0.01
  3. *** p < 0.001