air brush alcohol art paper ash ashes benzine black and white blackening blacking blackwash brand briquette brouillon brush burnable burnt cork butane calx camera lucida camera obscura canvas carbon carbon black cartoon chalk charcoal drawing chiaroscuro cinder clinker coal coke combustible coom crayon crow delineation design diagram doodle dope draft drafting drawing drawing paper drawing pencil drier dross easel ebauche ebon ebony esquisse ethane ethanol fireball firing fixative flammable flammable material fuel fuel additive fuel dope fume gas gas black gas carbon gasoline graph ground heptane hexane inflammable inflammable material ink isooctane jet jet fuel kerosene lampblack lava lay figure line drawing maulstick medium methane methanol natural gas night octane oil paint paintbrush palette palette knife paraffin pastel peat pen-and-ink pencil pencil drawing pentane pigments pitch propane propellant raven reek rocket fuel rough copy rough draft rough outline scoria scratchboard siccative silhouette silver-print drawing sinopia sketch sketchbook sketching sketchpad slag sloe smoke smudge smut soot spatula spray gun stove black study stump sullage tar tracing turf varnish vignette