shows that PVA and chitosan film without added anthocyanin extract have no significant absorption maxima in the visible and ultraviolet regions. In the TTI, in the UV–Vis spectrum, it is possible to observe an absorption maximum in the UV–Vis region at a wavelength of 320 nm, characteristic of anthocyanins in the neutral range, exhibiting a hypochromic shift compared with the PVA/chitosan film without added anthocyanins (Fig. 2). Levi, Scarminio, Poppi, and Trevisan (2004) observed the same profile for acidic/basic anthocyanin extracts. The results confirm the incorporation of anthocyanin extract into PVA/chitosan film.