You don’t always have to use ink or paint wash to show volume in hair.
I love working in the Hahnemühle Travel Journal. (See also the Hahnemühle Travel Book category.)
It contains paper suitable for drawing and for pen and ink. I’ve used it for that in this sketch.
Sometimes I also do washes on it as you will have seen on this blog.
But other times line can carry and suggest volume in a gentler but also more dramatic way—because it is suggested and the viewer has to participate in the seeing.
It is after all fun to let all those lines we spent time building continue to show sometimes!