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 92
87 THE GRAMMAR OF PHOTO-ENGRAVING. leading under the buff-wheel, C, which is made removable, so that it can be replaced with buffs of different surfaces. Thus the first is covered with leather, using emery powder ; another … Fig. 39 covered with ducking, using rouge or other suitable polishing material. The last one used being clucking buffs cut around about eight inches in diameter with a hole in the centre large enough to fit on a mandrel similar to a circular saw. Etching Brush. The ordinary brush without protection…
Photoengraving
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.