Photographic system and process
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United States of America Patent
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-
Jul 1, 1986
Issued Date -
N/A
app pub date -
Sep 12, 1983
filing date -
Nov 16, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a developer for use in a one-step process for the development of exposed film resulting in an exposurewise pattern of silver particles which are large enough to be used as printing elements in ink-printing techniques, providing a wide range of densities in the developed film. The developer is based on a buffered system of a developing agent, a sulfinic acid salt of the type HO-R-SO.sub.2.M..times.H.sub.2 O where R is a hydrocarbyl group and M is a cation, and a formaldehyde source, with conventional adjuvants such as anti-fogging agents and the like. Instead of the sulfinic acid salt defined above there may be used any compound which upon dissociation in a aqueous medium results in the same active ionic species.
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Cited Art Landscape
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