When ruling a line in ink, place the ruler wrong side up along the pencil line, hold very steady and rule with the ruling pen. If a wide line is required, draw two lines and fill in between them with a brush or ruling pen.
Shaded drawings in black and white are rendered in pencil, charcoal, crayons, crayon pencils and oil or water color paint.
There are many kinds of papers in white and color. The student should try experiments with these papers, although certain papers are prepared for certain mediums.