I found the same thing with my Pentel Pocket Brush Pen, however, with practice I have been able to reduce the line-weight considerably. It just takes a much lighter stroke than I'm used to, and speed/precision.
heard only the best of the kuretake, should be the one you're looking after. i hated somewhen the pentel pocket brush and went with just simply real brushes and windsor/newton's caligraphy ink. such a rich black!
I agree with ~raerae, Kuratake makes some really stellar brush pens. They can be pricey, but they're worth the money because as long as you take care of them, they'll take care of you. They have both refillable and disposable, and all are great. The no. 13 is good, the no. 40 is soooo sweet. But it's hella pricey, because it's a sable hair brush, and if you treat it with care, it will never fail you. Pentels are crap. I have two of them and I really only use them to spot blacks, otherwise, they're pointless...literally.
fasonFeatured By OwnerAug 9, 2013Professional General Artist
For a grab and go pen, I like the Staedtler Mars Graphic 3000 Duo. It has a brush nib and a marker/pen end. It's the only brush pen I've found that the ink will actually run out before the brush nib will begin to split or wear and it gives a nice, dark black.