3.1 A coated panel is placed on a firm horizontal surface.
The pencil is held firmly against the film at a 45° angle (point
away from the operator) and pushed away from the operator in
a 6.5-mm (1⁄4-in.) stroke. The process is started with the hardest
pencil and continued down the scale of hardness to either of
two end points: one, the pencil that will not cut into or gouge
the film (pencil hardness), or two, the pencil that will not
scratch the film (scratch hardness).