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 148
er negative than others. If the exposure time has been too short, theimag-e will be late in appearing as compared tothe normal, and the details in the half-tones andshadows will hang back, and if the development iscarried on as for proper exposures the high lightswill gain the desired intensity… … VIGNETTED HALF-TONE, HIGH-LIGHT EFFECT — 100-LINE SCREEN.From wash drawing- by W. L. Wells. MANUAL OF PHOTO-ENGRAVING. 101 slowly, the details having- time to appear beforethe high lights assume any great intensity. When the details have properly appeared, theplate can, if necessary, be returned to…
Photoengraving · Color photography
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