| Photography Encyclopedia: Woodburytype |
Also known as ‘photoglypty’, this photomechanical process was based on work with chromate relief images (Auer, 1852; Pretsch, 1854), and patented by W. B. Woodbury in 1866. The process produced a bichromated gelatin relief, which was used to emboss a soft lead plate; this intaglio held a liquid gelatin ink whose varying thicknesses produced the fine, continuous-tone gradations of the pigmented gelatin image. Woodburytypes resemble carbon prints in colour and surface finish, but show a more obvious relief. Woodburytype was employed from the mid-1870s until the early 1890s, primarily for art reproductions. It was succeeded by less labour-intensive gravure processes suited to longer print runs at a lower cost.
— Hope Kingsley



