A manual of photo-engraving : containing practical instructions for producing photo-engraved plates in relief-line and half-tone with chapters on dry plate development and half-tone color work (1896)
Jenkins, H. (Harry), 1868- · Chicago : Inland Printer · leaf 114
revent theacid attacking them and causing breaks. This isusually done by powdering four ways, as fol-lows : Take the plate to the powder box, and dumpsome of the dragons blood on it, then beginning atone edg*e of the plate pass the brush over it fromthat side to the side opposite, so that the… … ZINC ETCHING —CRAYON EFFECT.From sketch by Frank Holme. MANUAL OF PHOTO-ENGRAVING. » < upright, and brush in even sweeps without lifting-from one extreme edge to the other. When thespaces between the lines are clean, and the lines allcovered, heat the plate again to cause the pow-der to adhere…
Photoengraving · Color photography
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