At 6 1/4" x 10 ¼”, Abandoned Waterworks is one of the largest drawings I've done to date. I didn't keep track of hours, but this one took ten days or so- Including at least a couple sessions spent working up, smoothing out the mist at the bottom.
I like mist I can see into, and the best way I’ve found to achieve transparence and depth is by building it up slowly, with many layers. I begin with a light layer of charcoal dust, lighten too-dark areas with a kneaded eraser; repeat the process; at the last, I’m using my hardest pencils to add very small marks and dots, and a dirty eraser shaped to a fine point to lighten or remove them.
Admittedly, a labor-intensive approach- But there are times when it’s the right kind of work for a couple hours. And usually, the results seem well worthwhile.