Pure pigments – every color is individually formulated to allow the unique character of each pigment to express itself. Soft body Uses the latest resin technology to give you maximum clarity and vibrancy, with minimal wet-to-dry shift Safe to use – tested by the art and creative materials Institute at duke University, our colors* hold the approved Product (Ap) seal, proving they are safe for studio and educational use Soft & Flowing – you want color you can use straight from the bottle. With a low viscosity and just the right amount of body, soft body is never too sticky or slippery. When you need to cover a wide area, This is your go-to Archival quality – The professional standard. Your work will have the greatest Archival permanence possible – at least 50 years+ in gallery conditions – with no color shifting or fading, To stay vibrant and true The perfect bottle – easy-open and close lid, a pre-cut nozzle for immediate use., screw-off top and wide neck for easier access, and no shoulders or corners for paint to get trapped in.