Method of activating a protective layer on a photographic element employing an organic solvent in the wash solution
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United States of America Patent
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Feb 25, 2003
Grant Date -
N/A
app pub date -
Aug 30, 2001
filing date -
Aug 30, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is a method of forming a protective overcoat on a photographic element which element includes a processing-solution-permeable overcoat that becomes water-resistant in the final product without lamination or fusing. The method involves the incorporation of a small amount of a water-soluble organic solvent in the last step of the photographic process, i.e., during the washing step. This method allows the use of durable water-resistant protective overcoat materials with relatively high glass transition temperatures, that normally do not convert to impermeable films at low temperature, or without fusing.
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