Studies drawn with my newest pens, the Pilot Hi-Tec-Cs I ordered from jetpens.com in a fit of faddishness early last week - not enough to be working in a moleskine, I guess, but have to try the obscure cheap pens, too.
The hand on the right was mostly drawn with the finest line: .25mm, with some shading done with a .50mm pen. Then I turned the book and drew again, this time with the heavier line throughout. Good practice, if nothing else, and now my right hand is more tired than my left.
I think I like these Hi-Tec-Cs even better than the Sigma Microns - the ink flows so nicely and so far they do not scratch. Wonder how long they'll last. . .