| 释义 |
reˈhalogenize, v. Photogr.
[f. re- 5 b + halogen + -ize.]
trans. To convert the metallic silver in a developed image back to a silver halide (with the silver or the image as obj.). So reˈhalogenizing vbl. n.
1940F. J. Mortimer Wall's Dict. Photogr. (ed. 15) 549 Rehalogenising, the re-conversion of the silver image in a finished print or negative into silver chloride, bromide, or iodide. 1969M. J. Langford Advanced Photogr. xi. 235 This bleach ‘re-halogenises’ the silver image—the ferricyanide oxidises the silver which reacts with the bromide and reverts to a silver halide. 1977J. Hedgecoe Photographer's Handbk. 324 Bleach, chemical bath capable of rehalogenizing black metallic silver.
Hence reˌhalogeniˈzation, the process of rehalogenizing.
1956Focal Encycl. Photogr. 967/1 Rehalogenization, conversion of a silver image back into one of silver halide. 1958Newnes Compl. Amat. Photogr. 323 As this process involves rehalogenisation of the silver image it is essential that the print and utensils used are completely free from hypo. 1967E. Chambers Photolitho-Offset iv. 48 An improvement in the dot etching properties of the positives can be effected by tanning the gelatin in proportion to the silver image, resulting in a greater degree of lateral etching without loss of density. This process is known as rehalogenisation, or metallising. |