It's a very nice brush pen, but I didn't find its
"watercolor" properties to be all that present or
outstanding. There are other fountain pen inks
available that are more water soluble than the ink
in this brush pen. But that might just be due to
it being black. For getting interesting gradient
effects, I felt like I had to put a lot of effort
and use a great deal of water to do so. Otherwise,
the ink remained quite dark. For all the effort, I
think just using a regular sumi ink or watercolor
paint would be a better use of my time.
Still, this is a nice disposable brush pen, with a
great range of line-widths. When the ink dries,
it's very opaque, and I would say it's darn near
waterproof. While not functioning quite the way I
wanted it t...