Dr. Ph. Martin's Bombay India Inks offer powerful color in a convenient dropper-stopper plastic bottle. These highly pigmented India inks not only remain lightfast and permanent but are also totally waterproof when dry. They adhere to nearly all surfaces and are non-clogging when used in pens. Inks can be diluted with water and used with brushes in traditional watercolor techniques or in dip pens, technical drawing pens, and airbrushes. All colors are brilliant and transparent. Each set includes four different colors in 0.5 oz (15 ml) plastic bottles with a dropper top. Made in small batches by hand in the USA. Comes in a red paper box with tissue paper. Set 2A Colors: Golden Yellow, Tangerine, Cherry Red, Aqua