. 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.