The pH of the film-forming dispersions before addition of microorganisms
was 4.1 ± 0.1. Contrary to reports by Kanmani and Lim
(2013), the microorganism inclusion did not alter the pH.
Kefiran films with or without microorganisms were easily removed
from the Petri dishes and they presented smooth surfaces and a transparent
and homogeneous aspect. The thickness of films varied between
13.2 μm and 19.3 μm, the moisture content was between 7.7% w/w and
12.1% w/w and no significant changes in these characteristics were
observed when microorganisms were included in the films (Table 1)