Black and white photographic material
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United States of America Patent
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Aug 3, 2004
Grant Date -
Feb 20, 2003
app pub date -
Jun 24, 2002
filing date -
Jul 7, 2001
priority date (Note) -
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Abstract
The invention provides black and white silver halide material for optical contact copying, comprising: at least one photographic emulsion layer including a silver-halide-containing matrix in which the matrix includes a polymer and a hydrophilic binder, wherein the ratio of the weight of silver in the emulsion layer to the weight of polymer in the emulsion layer per unit area is less than 2.0. The photographic material is suitable for use in optical contact copying providing reduced contact gain compared to that provided by conventional photographic material.
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