Book folding is the stage of the book production process in which the pages of the book are folded after printing and before binding.[1]
Until the middle of the 19th century, book folding was done by hand, and was a trade. In the 1880s and 1890s, book folding machines by Brown and Dexter came onto the market, and by the 1910s hand-folding was rare, with one publisher declaring them to be "practically obsolete" in 1914.[1]
The folding process is also necessary to produce print products other than books—for instance mailings, magazines, leaflets etc.