Dyed film

n_o

n_s

n_o/n_s

k

R²

Methyl red

0.814 ± 0.011

0.276 ± 0.021

2.955 ± 0.227

0.036 ± 0.005

0.98664

Crystal violet

1.052 ± 0.014

0.214 ± 0.030

4.909 ± 0.689

0.023 ± 0.005

0.99426

Methyl orange

0.159 ± 0.007

0.051 ± 0.006

3.100 ± 0.404

0.024 ± 0.005

0.96574

Melthylene blue

1.399 ± 0.031

0.190 ± 0.020

7.352 ± 0.788

0.030 ± 0.002

0.99435