Automatic Pens are still used in calligraphy and are available in a variety of line widths. The guide on the side of the 3E pen (E for Edge) is being used here against the edge of a table to lay down a perfectly straight border line along the edge of the drawing material. This method was replaced with border lines being scribed or cut out of a peel coat sheet. Later still, precision cut graphic tapes, some extremely fine, were laid down, their deep red colour ideal for photographic reproduction work.