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International Journal of Interdisciplinary Research

Table 2 Descriptive statistics for L*a*b* coordinates of unexposed standards and specimens exposed to colorfastness to light testing

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

Dye/mordant Standard/exposed to light L a b Color swatch
Mean (SD) Mean (SD) Mean (SD)
Black walnut
PAS mordant
Standard 61.32 (0.96) 11.59 (0.46) 24.70 (0.71)
Black walnut
PAS mordant
Exposed to light 65.06 (1.17) 11.66 (0.56) 25.64 (0.88)
Black walnut
No mordant
Standard 57.59 (1.43) 10.49 (0.50) 22.12 (1.25)
Black walnut
No mordant
Exposed to light 62.54 (1.31) 10.59 (0.36) 23.43 (0.61)
Osage orange
PAS mordant
Standard 69.49 (1.52) 8.37 (0.60) 56.03 (1.79)
Osage orange
PAS mordant
Exposed to light 63.96 (1.11) 10.12 (0.26) 45.90 (1.06)
Osage orange
No mordant
Standard 70.40 (1.67) 6.24 (0.39) 45.02 (1.76)
Osage orange
No mordant
Exposed to light 63.66 (0.84) 10.24 (0.34) 35.29 (0.98)
Eastern redcedar
PAS mordant
Standard 73.87 (1.39) 7.98 (0.19) 24.77 (0.74)
Eastern redcedar
PAS mordant
Exposed to light 79.21 (0.95) 6.20 (0.49) 24.46 (0.87)
Eastern redcedar
No mordant
Standard 71.06 (1.19) 9.08 (0.38) 14.93 (0.78)
Eastern redcedar
No mordant
Exposed to light 75.93 (0.91) 6.37 (0.25) 18.22 (0.38)
  1. Color swatches were generated with L* (lightness), a* (greenness-redness), b* (blueness-yellowness) rounded to the nearest whole number using http://www.workwithcolor.com/color-converter-01.htm. The standard and specimens were 100 % wool yarn. Potassium aluminum sulfate (PAS) was the mordant