Table 5 Statistical comparison of color change values for oak specimens subjected to heat treatment and heat-treated samples after bleaching treatment

0.98 (0.54)h

1.58 (0.68)ıj

− 7.76 (1.12)d

8.03 (1.06)cdef

− 6.00 (0.43)c

3.63 (0.51)n

4.95 (0.91)hı

8.62 (0.73)fgh

− 6.59 (0.74)b

− 6.90 (0.47)a

5.99 (2.38)ı

11.43 (1.54)k

2.30 (0.34)kmn

− 0.49 (0.70)ef

− 7.78 (1.14)d

7.94 (0.85)cdef

0.14 (0.41)g

1.22 (0.56)hı

− 2.76 (1.34)f

8.14 (0.76)defg

− 6.57 (0.46)b

2.02 (1.30)jm

5.94 (1.61)ı

9.22 (1.31)ghıj

− 7.22 (0.41)a

− 6.26 (1.11)ab

9.30 (1.52)j

13.42 (1.11)m

2.55 (0.43)mn

− 0.64 (0.88)ef

− 3.86 (1.00)ef

4.78 (0.87)a

1.37 (0.27)hı

2.36 (0.60)m

− 7.09 (1.11)d

8.19 (0.70)efg

− 5.07 (0.36)d

3.16 (0.51)n

0.86 (1.67)g

6.25 (0.48)b

− 6.07 (0.61)c

− 6.00 (0.60)b

5.28 (2.60)hı

10.25 (1.61)j

2.63 (0.49)n

− 0.60 (0.62)ef

− 7.44 (0.94)d

7.94 (0.97)cdef

0.98 (0.48)h

0.00 (0.38)fg

− 9.38 (1.37)c

9.45 (1.34)hıj

− 5.72 (0.33)c

3.01 (1.14)n

1.71 (1.40)g

6.89 (0.61)bc

− 5.81 (0.69)c

− 5.67 (0.66)b

3.76 (1.64)h

9.07 (1.05)fghı

1.55 (0.47)ıj

− 1.76 (0.60)d

− 6.59 (0.96)d

7.03 (0.97)bcd

1.19 (0.41)hı

0.64 (0.72)gf

− 9.75 (1.39)c

9.87 (1.41)ıj

− 4.58 (0.34)e

3.25 (0.67)n

− 3.21 (1.71)ef

6.67 (0.67)b

− 5.64 (0.62)c

− 3.19 (0.94)c

0.82 (3.21)g

7.17 (1.31)bcde

1.90 (0.40)jk

− 1.67 (0.58)d

− 7.52 (1.57)d

7.96 (1.57)cdef

2.08 (0.47)km

− 1.08 (0.64)de

− 18.55 (0.83)a

18.72 (0.80)n

− 4.01 (0.63)f

3.24 (0.77)n

− 4.54 (2.01)e

7.13 (0.94)bcde

− 5.89 (0.61)c

− 3.65 (0.67)c

4.11 (2.84)h

8.38 (1.72)fgh

1.09 (0.89)hı

− 3.42 (0.75)c

− 13.69 (1.05)b

14.19 (1.06)m