It not only depends on the ink but on the paper, and the usage. When writing long documents there's no problem, but when signing contracts (or initialing them)

It not only depends on the ink but on the paper, and the usage. When writing long documents there's no problem, but when signing contracts (or initialing them) a blotter is very necessary because there's no time for the ink to dry before another paper comes on top of it. Also, it's a cool object ;-)