Aromatic compositions for treating silver images
Abstract
Abstract A COMPOSITION FOR TREATING A SILVER IMAGE, SUCH AS THAT OBTAINED BY THE PHOTOGRAPHIC SILVER SALT DIFFUSION TRANSFER PROCESS ON A HYDROPHILIC SURFACE, COMPRISES AN ACIDIC AQUEOUS SOLUTION CONTAINING: (A) A LONG CHAIN AROMATIC CATIONIC COMPOUND, SUCH AS A LONG CHAIN ORGANIC QUATERNARY AMMONIUM COMPOUND, OR A LONG CHAIN ORGANIC SULPHONIUM COMPOUND, 8B) IODIDE IONS, AND 8C) A HETEROCYCLIC ORGANIC COMPOUND WHICH HAS A NITRO GROUP BONDED TO AN AROMATIC NUCLEUS, SUCH AS 1-(2'',4-DINETROPHENYL) PYRIDIUM CHLORIDE, OR AN ORGANIC CATIONIC COMPOUND HAVING AN AROMATIC GROUP BUT NOT NITRO GROUP. A PRINTING PLATE COMPRISING A HYDROPHILIC SURFACE HAVING A SILVER IMAGE THEREON WHICH HAS BEEN TREATED WITH THIS COMPOSITION, AND A PROCESS FOR PREPARING SAID PLATE COMPRISING CONTACTING A SILVER IMAGE ON A HYDROPHILIC SURFACE WITH THIS COMPOSITIONS, ARE TAUGHT.
Inventors
- 👤 R Kemp
Bibliographic Details
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