When sourcing large-scale floral art, you must prioritize high-quality canvas (380gsm or higher) to prevent sagging over time. For oil-based works, ensure the use of non-toxic, eco-friendly pigments that meet REACH or RoHS standards. If the paintings are hand-painted, verify the texture depth and impasto techniques, as these significantly increase the perceived value. For printed versions, ensure a minimum resolution of 300 DPI and the use of UV-resistant inks to prevent fading in high-sunlight environments like hotel lobbies or corporate offices.