This is a mixed media piece, that was painted with water-soluable ink pencil before being colorized in Photoshop.  Here’s the process:

After doing the sketch, I use my light box to get the forms onto the final paper, before painting it in.

After scanning, contrast adjustments are made on certain details, and shapes/values that distract from where I want the viewer to (ultimately) look are adjusted or removed.  I also exaggerated the frown a little more and had to restore the paper texture in places.

This was the original color scheme I wanted, so I added in the base colors.

Some subtle colors and gradations were worked in, and the background chain pattern from my original sketch is roughed in and organized.

The chains are finished.  This is where I decided to swap colors to a scheme that I thought was more striking and made more narrative sense.

I made more adjustments (didn’t like how the chain pattern drew the eye too far down the center, so I used this approach).

Final adjustments; done!