*3*.*3*. *UVA Analysis of the Samples*

Before the UVA transmission measurement was obtained, samples were first prepared by mixing 1 mg of Ag nanomaterials, SnO2 nanomaterials, SnO2-Ag composite nanomaterials, Ag powder, and SnO2 powder with 3 mL of laminating fluid. Clean glass substrates were then coated with the nanomaterials-laminating fluid mixtures via the drip method. The coated glass slides were air dried and were later exposed to an OMNI PAR 38 Flood 120 W lamp light source. The relative intensity *vs.* time graph was obtained using a PASCO UVA light Sensor and was plotted using PASCO's Data Studio real time graph software. The graphs obtained are shown in Figure 5. As can be seen in the figure, the relative intensity was reduced when the glass slide was coated with the laminating fluid mixed with silver and tin oxide bulk powder. The basis for the decrease in intensity is that the material's surface was opaque and blocks UV light. On the other hand, the glass slide coated with the laminating fluid mixed with 4:1 ratio of tin oxide and silver nanomaterials had the least transmission for UVA and was transparent to visible light.

**Figure 5.** Graph of relative intensity of UVA *vs*. time graph of tin-oxide, silver, mass ratio of tin oxide silver nanocomposite material, glass slide, and without glass slide.
