The Polychromatic Woodburytype-Colour Tracking in Translucent, Patterned Gelatin/Pigment Films.

The Woodburytype is a 19th century photomechanical technique capable of producing high-quality continuous-tone prints. It uses pigment dispersed in gelatin to produce a 2.5D print, in which the effect of varying tone is produced by a variation in the print height.