Most of my larger black and white figurative images are created using either black oil pastel or graphite coupled with the use of turpenoid.  

Click on thumbnails at left to view larger images.

I typically use oil pastel and turpenoid for longer poses, from five to 20 minutes in length.    The resulting image usually contains a richness of dark texture imparted by scrubbing the pastel image with a turpenoid-soaked brush.   A rather heavy stock of Bristol Board is my favorite surface for this kind of image;  it is quite hard and smooth, and will allow you to repeatedly scrub the surface.  When enough pigment is applied, the wet brush glides freely on the image.   I wind up both drawing and painting on the same surface, often using one hand to draw, and the other to paint.    

A number of these longer poses have been used as the basis for  many of my computer-drawn  digital images.