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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 79

An illustration from 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, leaf 79
74 THE GRAMMAK OF PHOTO-ENGRAVING. most popular being the line plates, 1, 1, fig. 30, two screen plates being necessary for the production of negatives as will be described farther on. ■ :::. =!-i-!-!-g-i-H :!±t £iL±i Fig. 30 Another style is a combination of 1, 150 lines to the inch, on one plate,… … Fig. 31 The Kit for the Half-Tone Work. Kits for this class of work are slightly different from the ordinary kind, but the plate holder remains the same. The kits are constructed so as to hold two plates instead of one, fig. 31.

Photoengraving

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