Schmincke Horadam Aquarell Watercolor - Ruby Red Deep, Full Pan Schmincke has a reputation for using only the highest-quality natural gums, water-soluble resins, and pigments for its line of Horadam watercolors. It's the only watercolor manufacturer in the world that uses the same formula for its tube and pan colors. - Schmincke Horadam Aquarell Watercolor - Ruby Red Deep, Full PanHoradam Aquarell fp, RUBY RED DEEP FP -