US PATENT SUBCLASS 430 / 413
.~ Physical developing

Current as of: June, 1999
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430 /   HD   RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF

401  DF  POST IMAGING PROCESSING {16}
413.~ Physical developing {4}
414  DF  .~.~> Amplifying
415  DF  .~.~> With processing ingredient in element
416  DF  .~.~> Silver halide as radiation sensitive medium
417  DF  .~.~> Radiation reducible metal compound directly produces catalytic metal nuclei in image area

DEFINITION

Classification: 430/413

Physical developing:

(under subclass 401) Processes wherein the image produced by radiation on a radiation sensitive product is contacted with reducible metal ions and a reducing agent to cause reduction of the metal ions to free metal in image areas. The radiation sensitive material cannot itself be a significant source of metal ions and must be a material different in some way from the material which is the source of metal ions.

(1) Note. The source of reducible metal ions or reducing agent may be either in the product itself or in a post imaging composition used to treat the product.

SEE OR SEARCH THIS CLASS, SUBCLASS:

477, for physical developers.