Here is an experiment with Conté à Paris Pierre Noire charcoal pencil and watercolor. The charcoal is dark as the darkest night and smears really nicely. More experiments to come!
I have enrolled in a two-day workshop on gouache this weekend. I am worried because the techniques used for gouache are diametrically opposed to all those used in watercolor. In common with oil painting, with gouache you apply the paint dark to light. Where in wc, you do the opposite. As per MacEvoy: We get a hint of what's involved in the use of gouache (pronounced "gwash") by considering the origins of the name: it comes from the Italian aguazzo, for "mud." I may be hopelessly muddled/muddied by Sunday afternoon.