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 98
lcohol is entirely gone. It is generally best to letit boil down to a small volume. Then test with thehydrometer, and if necessary add clean water tomake it register 50. Then filter well, and it isready for use again. If it fails to work clear, adda few drops of nitric acid C. P. 8. To remove… … HALF-TONE —35-LINE SCREEN. MANUAL OF PHOTO-ENGRAVING. 65 by neutralizing- the bath with bicarbonate of soda,and sunning-. Filter and acidify ag-ain. 10. If the bath becomes over-iodized, pour itinto some clean water to precipitate the iodide,filter, and boil down to required streng-th. If thebath…
Photoengraving · Color photography
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
