Dr. Ph. Martin s iridescent calligraphy colors are shimmering, highly reflective colors that are lightfast, waterproof, archival, and permanent. Made from the finest ground pigments, the unmatched color intensity of Dr. Ph. Martin s iridescent calligraphy colors gives you the ability to cover dark surfaces with a dynamic range of metallic color. Great for use on paper, wood, board, metal, and some plastics. Dr. Ph. Martin s iridescent calligraphy colors dries smooth and even every time. No start and stop marks. Great for use with pens (both calligraphy and dip pens), airbrushes, and brushes. Designed specially for calligraphy, to accent watercolor work, or anywhere where you need to add a magical shine and shimmer that only pigment-based iridescent color can provide. Each set includes 12 different colors in 1.0 oz (30 ml) glass bottles with droppers and a custom mixing palette. Set 2 colors: 13R nickel, 14R brass, 15R bronze, 16R copper, 17R saffron yellow, 18R frosted peach, 19R rose lame, 20R misty blue, 21R amethyst, 22R crystal mint, 23R metallic green, 24R sequins blue.