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Papyrograph

1. PR. An older process, used for copying letters or circulars, patented in 1874. Used in Britain and the U.S. during the 1870s and 1880s.

2. PM. A different process was given the same name by Sir H. James, and was a variation of the photolithographic transfer process. See PHOTO-PAPYROGRAPHY.

3. PM. A modification of PHOTOLITHOGRAPHY which used a paper support instead of a stone or metal plate. (Nadeau, Encyclopedia, p. xxx).

Papyrograph, 1895. 250x190 mm Papyrograph, 1895. 250x190 mm

Papyrograph, 1895. 250 x 190 mm.