Dr. Ph. Martin's Hydrus fine art watercolor is lightfast, transparent, fine art quality watercolor in a glass bottle. This liquid product delivers the same brilliance and permanency as traditional tube watercolors. Made from the finest artist pigments, Dr. Ph. Martin's Hydrus fine art watercolor can be blended and intermixed while still maintaining the transparency and luminosity of the colors. Each set comes in a tray that doubles as a mixing palette and bottle holder, with space for a water cup and twelve individual mixing wells. Great for use in technical, calligraphy, fountain pens, and in airbrushes. Each set includes 12 different colors in 1.0 oz (30 ml) glass bottles with droppers and a custom mixing palette. Set 1 colors: 1H hansa yellow light, 2H gamboge, 3H brilliant cad red, 4H deep red rose, 5H quinacridone magenta, 6H phthalo green, 7H phthalo blue, 8H ultramarine, 9H cobalt violet, 10H venetian brown, 11H carbon black, 12H titanium white.