the transmittance was reduced by 27%, 28%, 41% and 54%
with 5, 10, 15 and 20 wt.% addition of CNF, respectively,
when compared to the neat TPS matrix.
The transparency of the films was also examined visually
against a background image (Fig. 5). From Fig. 5 it
can be seen that all the films can be considered translucent,
and up to 15 wt.% of CNF, there is no great reduction
in the clarity of the films. In addition, no visible aggregates
of cellulose nanofibers can be seen by the eye in any of the
films