achine and whirled over a gasburner to dry the enamel and produce an absolutely evensurface. The negative is then placed in contact with thesensitized copper in a printing frame, care being taken thatthe temperature of each does not vary. After printing, thecopper is laid in a tray of water and… … Both of these half-tones were made from the samecopy (one negative.) At the left is shown a half-tone flat etched. The reproduction on the rightshows the same plate after proper finishing and re-ctching. After cooling the enamel is dyed with methyl violet to showmore clearly the development of the…
Printing
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