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 59
HALF-TONE— 150-LINE SCREEN. … MANUAL OF PHOTO-ENGRAVING. 35 the salts have been added and dissolved, pour thesolution into the solution of gun cotton and shakewell. This collodion will usually be found to workwell in a few hours after making-, but should it failto work clearly add a few flakes of iodine to turntoward a red…
Photoengraving · Color photography
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
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