Table 2. Changes in dimensions of heat-treated (HT) and non-heat-treated (NHT) PVA/PAA/NR@TOCNF colorimetric indicator films (CIFs) during storage with pork at room temperature (25±2°C)

Storage period (days)	NHT-PVA/PAA/NR@TOCNF			HT-PVA/PAA/NR@TOCNF
		Length (cm)	Width (cm)		Length (cm)	Width (cm)
0		2.02±0.051)a2)	2.06±0.04a		2.05±0.05a	2.10±0.05a
2		2.40±0.07b	2.45±0.01b		2.47±0.00c	2.40±0.03b
4		2.49±0.03b	2.54±0.00c		2.37±0.04b	2.44±0.15b
6		2.48±0.05b	2.53±0.03c		2.48±0.02c	2.52±0.03b

All values are mean±SD (n=3).
Values with different superscript letters (^a-c) in the same column are significantly different at p<0.05 by Duncan’s multiple range test.