The grammar of photo-engraving : containing instruction in drawing, chemistry and optics, as applied to photo-engraving, and a practical treatise on the art of half-tone, zinc etching, swelled gelatine, lithotype and chalk plate engraving, as practiced in the United States (1895)
Farquhar, H. D. (Harry D.), Eder, Josef Maria, 1855-1944 · London : Dawbard & Ward · leaf 55
50 THE GRAMMAR OF PHOTO-ENGRAVING. When in use, the plate holder should be kept perfectly clean, and varnished frequently with asphaltum varnish. The camera should also be provided with a hood or a cover- ing for the lens to keep out side or reflected light. Fig. 18. … Fig. 18 It can be provided with a light-tight lid which can be used in place of the cap, another lid should alse be placed on the top at A, so that the stops can be changed. The ground-glass generally sent out with cameras is of an inferior quality, being on common class, coarsely ground. Better…
Photoengraving
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Photographic optics and colour photography [electronic resource] : including the camera, kinematograph, optical lantern, and the theory and practice of image formation (1909)](https://img.insideoutlibrary.com/img/200/ia-b21287223-176-0.webp)
