## 4 Conclusions  
As we did before with other natural dyes, we successfully combined PC and PE samples in two different laminar nanocolays: natural M and synthetic L. The XRD patterns show how both structures were changed by both PC and PE intercalations. The maximum d\({}_{001}\) in the PC hybrid pigments was found with the L clay using a silane modifier. With PE the best conditions for both clays appeared at a high dye concentration. With M, it was better to use a surfactant to open the clay structure and load the dye in the basal space. With L, the maximum d\({}_{001}\) was achieved using the silane additive. After protein adsorption under different conditions, both nanoclays stabilized PC and PE by allowing their manipulation at room temperature. It was no longer necessary to avoid light at \(-4\)\({}^{\circ}\)C given their initial solutions (buffer phosphate preparations). Figure 17: Main effects and interactions plots from the d(001) nm response in the PE pigments. Synthesis performance, and optical and thermal properties, depend on the nanoclay structure, the concentration of both dyes added during the synthesis process, and also on additives, the surfactant and/or silane addition, as we explored before with other natural dyes [55]. This time, however, the slight stability of both proteins was extremely difficult, which could be avoided by controlling pH during adsorption. The maximum adsorption in both dyes at the maximum dye concentration was achieved when silane was employed after dye addition, as we studied before [56]. Nevertheless, the presence of silane decreased dye adsorption in PE, but increased adsorption in PC. We performed all the ANOVAs for each dye separately because of the significant differences found. The color gamut in both dyes was wide and very interesting. To acquire darker samples as a starting point for a wide color gamut, the high dye concentration must be used with both PC and PE. With PC and L, the most interesting colors were acquired without employing the surfactant and silane additives. The M clay gave more chromatic results at the high concentration than L. In PE, the most chromatic samples were achieved with neither the surfactant nor silane in the L clay. In these samples, less chromatic and lighter samples were found at the medium concentration level (1%) due to the agglomeration phenomenon in the nanoclay structure at this concentration. Both dyes' intercalations in the nanoclay structures were reflected in the thermal patterns because of the changes in structural water loss. In PC, the lesser thermal resistant dye, thermal stabilization was observed due to nanoclay-dye interactions. Finally, the TSR (%) values of all the synthesized pigments went up to 50%, which makes all these pigments interesting for coating applications as cool pigments. Moreover, depending on the synthesis conditions, the TSR values significantly affected the results. In relation to dye adsorption and color perception, both additives, silane and the surfactant, inhibited the dye-clay interaction. When more dye was lost, samples were lighter and less chromatic, but the TSR (%) values were high. This is why these factors must be controlled according to the final application. Agglomeration is a risk that must be taken into account for future applications. For example, if these hybrids are to be used as polymer additives to improve their optical properties. Polymer properties will improve if hybrid pigments are exfoliated in the polymer matrix. Therefore, depending on the application, the silane and surfactant can be important to not only increase the adsorbed PC or PE in nanoclays' structures, but to also improve particle exfoliation in a polymer matrix [57; 58]. Other potential applications are packaging, including the food packaging, cosmetics, textile industries, as pigments for stamp or additives for filaments (spinning) and 3D printing (filaments or resin baths) [59; 60; 61]. In all the industrial applications, size control is important and can be the reason for select L or M as a nanoclay.