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 80
of the original, each shade beingcomposed of dots of a certain size. A somewhat different effect than that obtainedwith the ordinary single or double line screen maybe produced by using a screen having the clearspaces of different sizes arranged in groups, andalso having the opaque obstructions…
Photoengraving · Color photography
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
