When did mimeograph machines (stencil duplicators) go out of common usage? I know digital duplicators are still produced, but I'm talking about the old school kind that were eventually superseded by the photocopier.
I know my mother, who was born in 1954, remembers having used one in school. Would a character born in the late 1960's have used them? To clarify, the character in question isn't an artist or anything, so he wouldn't have had any reason to use one for any special purpose.
ETA: Just so we're all clear- I'm talking about mimeographs (stencil duplicators) and not ditto machines (spirit duplicators- these are the ones in the funky colors).