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 154
—Under-exposure or devel-oper too strong. Frilling.—Solutions too warm, insufficient alumin fixing bath or prolonged washing-. Flatness.—Over-exposure or too much alkali indeveloper. Spots.—Dust or bubbles in developer. Stains.—Developer oxidized, impure chemicalsor not enough sulphite in… … ZINC ETCHING OF PORTRAIT—MEDALLION EFFECT.From drawing by Jules M. Gaspare!. MANUAL OF PHOTO-ENGRAVING. 103 CHAPTER XIV. ORTHOCHROMATIC PLATES — COLORWORK. COLOR. THE undulatory theory of light, which is nowaccepted as explaining- most satisfactorily itsvarious phenomena, assumes that light is…
Photoengraving · Color photography
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