Coating formulas were applied with a spiral bar using an Elcometer 4340 automatic film applicator. Spiral bar size and coating speed were adjusted to allow a total solid deposition of 2 g/m² in 5 passes for each coating formula. Coated samples were dried at 70 °C in a contact drier after each pass. Three series of coating experiments different by composition and layer structure (Figure 1) were performed as follows: a) Single-component coatings: ACh, CCh and QCh (Figure 2a) and MFC films (Figure 2b); b) Composite coatings consisting of the ChD: MFC mixtures (1:1): ACh:MFC, CCh:MFC and QCh:MFC (Figure 2c); c) Successive coatings, consisting of a 1 g/m² MFC base layer and a 1 g/m² ChD top layer: MFC-ACh, MFC-CCh, MFC-QCh (Figure 2d).