Table 3 Effect of dye concentration on the color strength.

From: Investigation of the properties of polyester blended knitted fabric dyed with luminescent dyes as a highly visible fabric

Fabrics

Dye conc.

Disperse Yellow dye

Disperse Red dye

K/S

L*

a*

b*

∆E

RUI

K/S

L*

a*

b*

∆E

RUI

value

rank

value

rank

Polyester /cotton

0.5

2.03

69.33

11.71

44.15

52.73

0.266

G

0.80

67.93

29.80

11.50

34.85

0.222

G

1

2.91

72.98

12.33

46.47

55.51

0.307

G

1.08

71.50

31.37

12.10

36.68

0.307

G

1.5

2.95

73.34

12.39

46.70

55.79

0.262

G

1.13

71.86

31.53

12.16

36.86

0.270

G

Polyester /bamboo

0.5

0.81

76.27

3.59

36.51

43.51

0.171

E

0.62

74.12

24.10

6.23

25.97

0.222

G

1

1.24

80.28

3.78

38.43

45.80

0.171

E

0.91

78.02

25.37

6.56

27.34

0.262

G

1.5

1.27

80.68

3.80

38.62

46.03

0.177

E

0.95

78.41

25.50

6.59

27.48

0.277

G

  1. Different dye concentrations used at pH (7), 120 °C for 1 h, L:R 1:40.
  2. L*:(lightness/darkens), a*:(redness/greenness), b*:(yellowness/blueness), ∆E: (overall color difference values in Hunter L, a, b coordinates).
  3. RUI values range can be categorized into If RUI < 0.2 that considered as excellent levelness. (E). If 0.2 < RUI < 0.49 that is considered as good levelness. (G), If RUI is between 0.5 and 1 that means poor levelness. (P), If RUI values are greater than 1 that indicate bad levelness. (B).
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