Table 2.

Color photograph and color parameters of PS, PS-KC and PS-KC-BRE labels.

Films	Color	L⁎	a⁎	b⁎	ΔE
PS		−0.14 ± 0.07a	−0.05 ± 0.06d	0.57 ± 0.07b	0.53 ± 0.03e
PS-KC		−3.65 ± 0.12b	0.24 ± 0.10d	0.84 ± 0.04b	3.75 ± 0.13 d
PS-KC-BRE-I		−4.01 ± 0.07b	3.11 ± 0.13c	1.22 ± 0.08a	5.31 ± 0.21c
PS-KC-BRE-II		−5.11 ± 0.18c	5.01 ± 0.29b	0.39 ± 0.16b	7.16 ± 0.33b
PS-KC-BRE-III		−8.02 ± 0.18d	7.50 ± 0.29a	−0.23 ± 0.11c	10.98 ± 0.32a

A white paper with L (89.98), a (−0.6) and b (−3.4) is used as control. Values are given as mean ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).