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 3 colors: 25H hansa yellow medium,26H chrome yellow, 27H vermilion hue, 28H carmine, 29H crimson lake, 30H quinacridone violet, 31H red oxide, 32H raw sienna, 33H raw umber, 34H turquoise blue, 35H blue aqua, 36H ultramarine red violet.