However, if you were creating a document with the intention of making multiple copies of it, you had a few options other than letterpress. Mimeograph made high-quality, black-ink documents created by typing on a stencil; ditto machines, which anyone my age remembers well from school quizzes, had both distinctive purple ink and a delightful smell from the duplicating fluid.
In Albany in 1940, there were a number of full-service mimeographing firms. They also provided addressing services, which required that every address be typed onto an individual stencil, which was framed in cardboard and then run through a machine called an Addressograph. There were also mimeos and dittos in thousands of offices.