A ballpoint pen is nothing short of a marvel of modern engineering – beneath that humble and inconspicuous exterior lies a surprisingly complex internal mechanism. Ballpoint pens use a tiny yet precise metal ball, which rotates freely inside the cartridge when pressed onto the paper.
As the ball rolls, the ink leaves behind a thin, consistent line for writing and drawing, evenly dispersed around its spherical form. The ink itself is often dense enough that it won’t dry up too quickly to ensure an enjoyable handwriting experience every time! It’s hard to deny how ‘cool’ it is that such an intricate assembly causes the ink to circle the ball – truly breathtaking stuff!