## 5 Conclusions  
The grey, yellow and colorless EPCs presented a similar pattern of transmittance, reflectance and absorbance from 400 nm (grey and colorless) and 450 nm (yellow). Nevertheless, the blue EPC behaved differently.  
The addition of the blue pigment in the composition of the blue EPC caused a considerable reduction in the transmission of all spectra, which was clearly manifested in a reduction in the maximum temperatures with respect to the other coatings, which was related to the good correlation between the % of NIR transmitted and the maximum temperatures registered and the % of NIR reflected.  
The anti-thermal additive used in the grey EPC did not achieve the desired effect, since it reduced both the PAR and NIR transmission equally.  
No EPCs achieved a PAR/NIR ratio greater than 1.  
The HALS-type photostabilizing additives blocked UV-A radiation more efficiently compared to the nickel-quencher-type additives, as they allowed for earlier PAR transmission.  
The EPCs presented relatively acceptable light scattering percentages, since none of them had a specific additive for this purpose in their composition.  
The tensile test showed that all the EPCs behaved as a soft and tough materials in both the longitudinal and transverse directions, manifesting within the elastic limit of proportionality, a linear relationship between stress and deformation that defines Young's modulus. It was also shown how the orientation of the polymer chains influenced the ultimate strength and deformation, as well as other parameters recorded. The greater the thickness of the plastic film, the greater the weight required to produce an impact rupture.  
As a general conclusion, we can say that the commercial yellow and colorless EPCs did not prevent heat losses during the night, nor, therefore, thermal inversion due to their high transmissivity of NIR radiation. The yellow EPC presented asymmetry between 300-400 nm between its faces, which is why it requires care in its placement; it was the least thick of all the plastics tested, and it was less resistant to the dart impact test. On the other hand, the experimental grey and blue EPCs presented interesting characteristics such as greater diffusion (grey) and greater reflectance of NIR radiation (blue), both showing a lower % of NIR transmittance, which improves the climate of a greenhouse under warm conditions. Nevertheless, the grey and blue EPCs also showed a low transmittance of PAR radiation, which can reduce production. These characteristics are very promising for developing EPCs for warm regions, thus improving the design of EPCs by adding smaller amounts of additives that allow for an increase in PAR transmissivity without losing their other properties.  
**Author Contributions:** Conceptualization, M.T.L. and E.G.; methodology, M.T.L. and E.G.; software, J.E.F. and R.J.-L.; validation, R.J.-L., M.T.L. and E.G.; formal analysis, J.A.R.-A.; investigation, J.E.F.; resources, M.T.L. and E.G. data curation, R.J.-L.; writing--original draft preparation, J.A.R.-A. and J.E.F.; writing--review and editing, M.T.L. and E.G.; visualization, R.J.-L.; supervision, M.T.L. and E.G.; project administration, M.T.L. and E.G.; funding acquisition, M.T.L. and E.G. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research was funded by TRANSFIFER E, grant number TRFE-I-2018/010.  
**Data Availability Statement:** The data presented in this study are available in the Article.  
**Conflicts of Interest:** The authors declare no conflict of interest.