(Fr.: glymmatographie sur acier)

This French term, for which we have not seen an English equivalent, probably comes from the Greek, “glumma,” which means “engraving.” This interesting process was used by Baudran of Paris, in the 19th century. A pantograph may have been used, à la Physionotrace, to transfer the photographic image (“n’attaque le métal que sous l’influence du cliché...”) to a steel plate. The cliché, i.e., collodion glass (or, less likely, albumen) negative in this context, was part of the photographic process and the steel plate became the printing matrix. The latter could be made light sensitive with a coating of bitumen of judea, quite popular during this period, and the resulting transferred photographic image could be engraved with machine ruling and/or a router. The process was in effect the equivalent of Photoxylography on steel. (Nadeau, Encyclopedia, p. xxx.).

Glymmatographie, 1870. 105x70mm Glymmatographie, 1870. 105x70mm

Glymmatographie, 1870. 105 x 70 mm.