...when you know what a mimeograph is and you remember the smell of mimeograph fluid. And your Sunday school teacher illustrated stories from the Bible on a flannel board.
Actually everybody gets "mimeograph" wrong. Calling the wrong machine(s) "mimeograph". 2 guys invented the mimeograph. Thomas Edison and Albert Dick (AKA A.B. Dick) They coined the name for a machine using a drum filled with thick liquid ink. The drum had a screen on one half of it. You would position it, screen side up and fill the drum with ink. Then a pad would be clamped onto the drum, and a stencil on top of the pad. When the drum was rotated ink would soak the pad, and "bleed" though the stencil. Paper was picked up and pressed to the stencil by an impression roller, and then ejected to a "receiving tray". It was also called an Edison Dick machine FWIW. But name was later changed to "mimeograph"
The machine people refer to as a mimeo was not a mimeo but an Azograph (or Spirit Duplicator) Also an A.B. Dick and Edison invention. That machine used a "stencil" and a "master" sheet. The stencil was a sheet of nitrocellulose. (yes they were VERY VERY flammable) and in the lab at the factory in Chicago (where I used to work) they had extensive fire fighting equipment and even mini fire trucks in the plant.
The Azo had the benefit of being able to make a "master" sheet or stencil on a standard typewriter. The master was basically a sheet of something similar to "carbon paper". Above the drum which held the master and the stencil, was a trough filled with "spirits". And yes here too, at A.B. Dick we got 55 gal drums of grain alcohol in. Yes they even had liquor stamps on them. They were kept under guarded lock and key. In the plant the alcohol was "denatured".
That fluid was placed in a trough above the master drum. It held a wick. The wick was on a cam, and as the drum was rotated and paper picked up and fed in, the wick wetted the pad/stencil combo. Paper pressed against it, and the "carbon" (or blue stuff) would dissolve at a controlled rate and show up as "print" on the paper.
The reason they invented that machine was because it was cheaper, and did not require special equipment to cut a stencil (as a mimeograph did). A standard old typewriter struck with enough force to "cut" the stencil.
I used to work there, actually befriended AB Dick Jr. Learned a lot. Also had a REALLY good friend I made there, named "Baldy" IIRC now his real name was Leonard Cohen or something like that. (was a VERY long time ago). He was a former Chicago Outlaw. Had done a stint in prison, and actually had earned a law degree while in there. But we worked together in the "remanufacturing dept" where offset printing presses were torn down to pieces and separated into bins. (our job). That is all we did.
We got to be good friends. (much longer story here). But, he was actually a REALLY nice guy. He used to come buy wearing his old "colors", and riding his ratty old "hog". We made a pair. Me on my BMW and him on his ratty old Hog in his colors. Funny thing was my parents really ended up liking him as well. They'd invite him for dinner and all. They didn't care. Sadly he ended up being murdered by of all people his landlord.
Sorry about the "novel". I could have written a lot more.