DANIEL SMITH Extra Fine Watercolor 15ml Paint Tube, Smalt Genuine DANIEL SMITH is the Innovative Manufacturer of Beautiful Watercolors for Artists Worldwide, and makes the largest range of watercolors of any manufacturer, more than 240 colors. The 240+ color collection includes the exciting PrimaTek watercolors made from minerals (like Amethyst) plus other unique colors (like Moonglow) not available elsewhere, and Luminescent Watercolors which allow artists to capture the luminescent colors that exist in nature that regular watercolors cannot capture! A fascinating historic blue that was popular from the Egyptian dynasties through the Renaissance. The pigment is a finely ground potassium glass, colored blue by cobalt oxide. The name comes from the mineral Smaltite, primary source of the cobalt component in medieval Europe. Since Smalt is a glass, it's beautifully transparent. Grayer than Cobalt Blue, and with lower hiding power, it's great for skies and for glazing over strong colors to cool them down. Smalt Genuine holds its hue even when mixed with large quantities of water, and also mixes cleanly with other colors. Excellent Lightfastness, Transparent, Granulating, Non-staining Geniune Smalt Conforms to ASTM D4236