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 52
alts of silver, the collodion actingmerely as a support to hold the salts. In the gela-tine process the silver nitrate is added to the solu-tion, thus directly forming the sensitive compoundswithin it, which, being held suspended in a finelydivided condition, are said to be in a state ofemulsion.… … ZINC ETCHING —ORDINARY OUTLINE NEWSPAPER CUT.From drawing by A. B. Shults. MANUAL OF PHOTO-ENGRAVING. 31 actinic rays, will have certain changes produced inits sensitive constituents. If the whole plate isexposed, it is evident that the change will be uni-form over the whole surface, but if only…
Photoengraving · Color photography
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