(a) Originally, technical fountain pens (fig 1-4) were used for ruling straight
uniform lines in drafting. They are also suited to freehand drawings (figs 1-5A and 1-5B).
These pens feature an ink reservoir attached to the barrel of the pen. Some reservoirs are
translucent plastic cartridges within the body of the pen. Ink is delivered to the surface through
a hollow shaft of a feed tube which forms the point. Ink flow is controlled by the cleaning pin
and gravity. The large ink supply held by the cartridge reduces ink loading time and the chance
of a spill. After using the pens, rinse all parts in running water and blot dry. If ink dries in the
pens, soak them in pen-cleaning solution and clean them thoroughly.
(b) Ballpoint pens are similar to fountain pens. The ink is rolled on by a small
ball located at the tip of the reservoir. The ink supply and point are permanently attached.
When the ink is gone, throw out and replace the pen. Ballpoint pens sometimes require a wipe
of the tip, otherwise there is no cleaning. They come in sizes from broad to extra fine.
(c) Felt-tip pens and markers have a nylon or felt core that distributes ink to the
points. The point of felt tips, like ballpoints, is permanently attached to the ink supply. Throw
the tool away when the ink supply is exhausted. These pens come in a large variety of different
point sizes and shapes. The ink in most felt tips is waterproof and dries instantly.
Figure 1-5A. Examples of pen and ink artwork