Complete both traditional watercolors and technical drawings with Dr. Ph. Martin's Bombay India Ink. This ink comes in a convenient dropper-stopper glass bottle and provides rich color. It is highly pigmented, allowing it to remain lightfast and permanent, and it becomes waterproof when dry. Use it with technical pens and airbrushes, or dilute it with water for use with traditional watercolor techniques. Enjoy creating brilliant and colorful works with these vibrant inks!