But the spirit duplicator didn’t use ghosts, it used either methanol (wood alcohol), isopropyl, or, if you were loaded, ethyl alcohol.

According to my trusty 1965 World Book encyclopedia, the ditto machine (spirit duplicator) and mimeograph (stencil duplicator) were competing technologies in the document-copying market.

Also known as stencil duplicators, mimeographs were a competing technology that used ink and stencils to produce 50 to several thousand copies.

The rotary stencil duplicator, or mimeograph machine, is a predecessor to modern document reproduction devices, such as photocopiers, offset printers and scanners.

An 1880 stencil duplicator applied magenta, a 1923 spirit duplicator slapped on cyan, a 1969 laser printer dropped in the black, and a 1976 inkjet printer supplied yellow.

A brochure for the Flying Eagle stencil duplicating machine, c. 1970s. Thomas S. Mullaney East Asian Information Technology History Collection, Stanford University ...

Inspired by the layering process that occurs during printmaking, Mohammed chose risography, a stencil duplicator, for his first box set.

"A Risograph is a digital stencil duplicator, a hybrid of screen printing and offset lithography that uses brightly colored soy-based inks," shares the center, and the cost is $85.

Albert Blake Dick (1856-1934) licensed the patent and began manufacturing equipment to make stencils for the reproduction of hand-written text. In 1887, the A.B. Dick Company released the model “0” ...

Chicago inventor Albert Blake Dick improved the stencils while experimenting with wax paper and merged his efforts with Edison's. The A.B. Dick Co. released the Model 0 Flatbed Duplicator in 1887.