This opaque ink from Dr. Ph. Martin's is considered to be one of the best whites on the market, especially for calligraphy. Bleedproof White was designed as a correction fluid, so it has incredible covering power, even covering dye-based colors completely. We recommend adding a few drops of distilled water, as this ink is quite viscous straight out of the jar. Dries with a slight sheen. Non-waterproof and cannot be mixed with other inks. 30 mL bottle.