In general, browning was initially faster in the CA loaded films,
as shown as an example in Fig. 2A, in comparison to data reported
by De'Nobili et al. (2013) for films made without CA, where a
pseudo-zero order browning kinetic was observed (straight line
shown in Fig. 2A). However, at longer storage times, browning
development that proceeded according to a pseudo zero-order kinetic
in films made without CA can produce higher YI values