The water-based ink dries instantly and is blur-proof so there's less chance of smudges and smears. It has a 0.6 mm tip, ideal for general writing. You can use the pen to write on paper, card and more. The ink is water-based but won't bleed through paper. The ink is blur-proof so you don't have to worry about accidental smudges and smears. The fineliner contains dark red ink. Links: Specification Sheet: Download Artline Fineliners SDS: sds-artline-200,-210-&-220.pdf About Artline Fineliners Range: Bring ideas to life with Artline’s range of fineline pens. Whatever you are creating, things flow better with Artline. From bringing ideas to life to helping you realise your potential; letting your messages be heard or articulating your memories, things simply flow better with Artline. For nearly 50 years, no matter what the occasion, message or idea, Artline has been helping things flow better. Artline was created by Japanese organisation Shachihata, which has always sought to set the highest standard for its products while maintaining its concern for the environment. In fact, Shachihata has obtained ISO certification for both its Quality Assurance and Environmental Management Systems. The result is a vast range of pens and markers for all purposes, manufactured responsibly to the highest quality standards and renowned the world over.