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International Journal of Interdisciplinary Research

Table 4 Mean differences in stain removal, color change, fabric smoothness, dimensional change, and skewness change by laundering cycles

From: Comparisons of fabric care performances between conventional and high-efficiency washers and dryers

  Laundering cycles F
0 1 5 10 15 20
M SD M SD M SD M SD M SD M SD
Stain removal 5.00a .08 3.23b .08 2.17c .08 1.68d .08 1.55de .08 1.37e .08 19.31***
Color change 5.00a .07 4.06b .07 4.09b .07 4.01b .07 3.93bc .07 3.67c .07 47.17***
Fabric smoothness 3.28a .06 2.52b .06 2.48b .06 2.47b .06 2.47b .06 2.53b .06 21.27***
Dimensional change (%) 0.00a .11 − 4.39b .11 − 4.71bc .11 − 4.92c .11 − 5.07c .11 − 5.07c .11 416.90***
Skewness change (%) 0.00a .21 1.26b .21 1.30b .21 1.52b .21 1.42b .21 1.58b .21 9.84***
  1. Stain removal was evaluated by a rating of 1 to 5. “5” indicates the worst performance (i.e., no color change; stains not removed at all)
  2. Color change and fabric smoothness were evaluated by a rating of 1 to 5. “5” indicates the best performance (i.e., no color change or no wrinkle at all)
  3. *** p < .001
  4. a, b, c, d, e Means with different letters are significantly different at .05 level according to the test of Tukey Honest Significant Difference