Dr. Ph. Martin's Bombay India inks offer powerful colour in a convenient dropper-stopper glass bottle. The ink is heavily pigmented India Ink which is both lightfast and waterproof when dry. It will hold a line without spreading and flows smoothly without tip drying. This set includes 12 different colours in 30 ml glass bottles with droppers and a custom mixing palette.  A truly vibrant and easy to work with waterproof ink. 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 colours are brilliant and transparent, except black and white, which are opaque and have excellent covering power.   They are all acid free, contain fine artist pigments, are non-toxic, Lightfast Archival, and waterproof. Colours Included Yellow Red Magenta Green Blue Brown Black White Violet Bright Red Teal Grass Green