photo etching (foto eching)

the ground or the lines of the design will resist acid, with which the plate is then etched: most commonly used for relief-plates on zinc, such as those of the Gillet proce . See photo - engrav ing. photogalvanography (fō-to-gal-va-nogʻra-fi), η. [Gr. φῶς (φωτ), light, + E. galvanography A A proce proce of obtaining from a photographic pos itive on gla an pos for printing like a plate. The gutta-perch a plate is intaglio gutta-perch a plate a hardened impre ion from a relief negative in bichromated gelatin, made according to the methods used in photo-proce . photogen (fōtō-jen), n. [F. photogène, According to Schulze the males of Lampyris splendidula po e two photogenic organs. Huxley, Anat. Invert., p. 379. IMG:content-0062.png:[blocks in formation]