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 111
and if over-exposed the ink will cling toparts from which it should separate. In such acase a few drops of ammonia added to the water inthe tray will often enable it to be removed. Rubthe image with the cotton until all of the lines areclean and sharp, being careful to see that the spacesare free…
Photoengraving · Color photography
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
