The Woodburytype is a 19th century photomechanical printing method, producing high-quality continuous-tone images that use a suspension of carbon black in gelatine as a relief print, in which the variation in height of the print produces the grayscale and contrast. We propose a phenomenological optical model for the process based on Kubelka-Munk theory that considers the ink formulation, the print height and the substrate surface in order to provide the ideal combination of printing depth and contrast.
Leech, D., Guy, W., & Klein, S. (2020). The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix. Journal of Physics Communications, 4(1), https://doi.org/10.1088/2399-6528/ab6ed4