I like the printed look that you get using flat colours so I’ve been going through a tutorial on digital colouring. It should work well in my printed publications.
You scan your pen and ink drawing in black and white drawing at 600 dpi, using the ‘text’ setting. This is to avoid the slightly fuzzy ‘anti-aliased’ edges you’d get using the regular 300 dpi colour or grayscale settings. In Adobe Photoshop you can then go to the Channels palette (above) and press that first button at the bottom of the palette ‘Load Channel as Selection’.
Invert the selection and, on a new layer and fill with the foreground colour. For a comic strip you’d fill with pure black but here I’ve filled with brown.
Lock this line art layer you’ve created add the flat colours on separate layers, with shading, as on the wall in my top illustration, on another layer.
I tried the ‘Load Channel as Selection’ with my finished colour version then, after inverting it as before, filled it with black, producing this grayscale version.