3.4.2. Thickness and WVP Analysis Results

As illustrated in Figure 3A, the thicknesses of all the indicator films were not significantly different. The considerable index evaluates whether the packaging quality is WVP, which can represent the ability to block external water vapor of a film. As summarized in Figure 3B, the WVP values of all the A-CBAL films were significantly lower than that of the A-CBA film. It may be that lecithin had hydrophobic tails, which reduced the hydrophilicity of the indicator film. Therefore, the liposome films reflected higher water vapor resistance. However, the films with different lecithin ratios had little difference between them, and the maximum values did not exceed 2.32 × <sup>10</sup>−<sup>7</sup> <sup>g</sup> · <sup>m</sup>−<sup>1</sup> · <sup>h</sup>−<sup>1</sup> · pa<sup>−</sup>1.

**Table 2.** The colors and opacity values of the films.


Note: the superscripted characters of a, b, c, d represent significant differences (*p* < 0.05).

**Figure 3.** Thicknesses (**A**), *WVP* values (**B**), and mechanical properties with *TS* (**C**) and *EB* values (**D**) of the bi-layer films. Characters represent a significant difference (*p* < 0.05).
