Review on Kuretake MANGA BLACK 60ml Ink - Ideal for Dip Pen, Brushwork, Art & Illustration - Smooth Flow, Smudge-Proof with Alcohol-based Markers - Perfect for Both Pro Artists and Hobbyists by Dawn Fischer

great ink to work with, very dark, dries quickly (which may or may not be professional depending on how you work), seems to be quite waterproof although I haven't worked hard with watercolors either. It dries fairly quickly and thick on the pen - not a big problem when drawing but make sure you have some rubbing alcohol or acetone to clean the pen afterwards as water doesn't help. The wide neck of the bottle is a godsend for fountain pens, I never have to worry about covering the body of the pen holder with ink, which I didn't appreciate until I used it.