Campfire, Adirondacks, photomicrograph

A resist is a material that covers and protects a selected area of paper over which a wash is subsequently applied. Once the wash is dry, the artist removes the resist, revealing the shape it preserved. Tiny white particles, possibly residue from a resist, appear across the surface of Campfire, Adirondacks (figure b). When viewed under a microscope, these particles appear as angular white chunks embedded in the watercolor layer (see figure a). …