8.1.1.1 Gouge Hardness—The hardest pencil that will leave
the film uncut for a stroke length of at least 3 mm (1⁄8 in.).
8.1.1.2 Scratch Hardness—The hardest pencil that will not
rupture or scratch the film.
8.1.2 The make and grade of lead or pencil used, and
8.1.3 Any deviation from standard conditions, including
roughness in the finish.