Daniel Huffman dug his dad’s old typewriter out of the basement and used it to type out a map of the major rivers draining into Lake Michigan.
The final product has various interesting smudges where the paper accidentally contacted the ribbon. In particular, I noticed that typing in red always produced a faint black “shadow” a couple of lines above. When the slug hit the red part of the ribbon, a small portion of it would lightly hit the black portion of the ribbon, too. Later on, I started holding scrap paper over my map in order to prevent this, so that the black shadow would go on the scrap.
In sum: my typewriter is not a precision instrument. This makes it a somewhat uncomfortable-feeling tool for a detail-oriented designer like me. I like being able to zoom in to 64,000% in Illustrator and correct errors that are small enough that no human eye could possibly ever see them. But, there’s something attractive about the organic messiness of the typewriter.
He experimented with a couple of other maps as well: a shaded relief map of Africa and a contour relief map of the Great Lakes.
See also An Atlas for the Blind.