Radiographic element having improved speed to Dmin ratio and manufacturing process thereof
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Jun 7, 1999
filing date -
Jun 19, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a process for manufacturing a silver halide photographic element comprising the step of adding to a silver halide emulsion (1) an aryl compound having at least two hydroxyl groups and at least one additional substituent represented by a sulfonic group, an alkali metal sulfonate group, a hydroxyl group, a carboxy group or a hydroxymethyl group, and (2) a polyhydroxyalkyl derivative selected from the group consisting of non-hydrogenated polysaccharides having an average molecular weight higher than 10,000 and hydrogenated polysaccharides having an average molecular weight equal to or lower than 10,000. The use of such a combination to increase the speed to Dmin ratio of a silver halide photographic element and a silver halide element comprising such a combination is also claimed.
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