medium (plural: media)
The material an art work is made with, such as graphite, charcoal, ink or paint.
graphite
The grey, slippery form of carbon used in pencils, graded from hard (H) to soft (B).
charcoal
Burnt wood (vine charcoal) or powdered charcoal pressed with a binder (compressed charcoal), used for rich darks.
tooth
The tiny bumps on the surface of paper that grab and hold dry media.
sighting
Measuring the size and angles of a subject by holding a pencil at arm's length.
construction lines
Light lines used to plan shapes, proportions and placement before details are added.
burnishing
Pressing coloured pencil hard so layers blend and the paper's tooth is filled, giving a smooth, shiny finish.
wash
A thin, watery layer of ink or paint brushed over an area.