Method for manufacturing a color coupler used in a silver halide photographic light-sensitive material
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United States of America Patent
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Jun 5, 2001
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N/A
app pub date -
Apr 7, 1999
filing date -
Apr 13, 1998
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Expired
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Abstract
A method for manufacturing a color coupler used in a silver halide photographic light-sensitive material using an ammonium trihalide. Said method for manufacturing the color coupler comprising the following step: a step for halogenating a coupling position of a four equivalent coupler using a halogenating agent, wherein said halogenating agent is said ammonium trihalide.
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