Photogr. [f. prec. + Gr. τύπος TYPE.] A picture produced by a calotype process using iodide of iron: see quot.
1853. R. Hunt, Man. Photogr., 80. It would seem as if the salt of silver, being slightly affected by the light, sets up a catalytic action, which is extended to the salts of iron…. The catalysis which then takes place has induced me to name this process … the Catalysotype.
1854. Scoffern, in Orr’s Circ. Sc., Chem. 85.
