Radiographic elements exhibiting increased speed and covering power
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United States of America Patent
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Sep 21, 1999
Grant Date -
N/A
app pub date -
Mar 9, 1998
filing date -
Mar 9, 1998
priority date (Note) -
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Abstract
A radiographic element is disclosed containing in a high bromide tabular grain emulsion layer a 5-mercaptotetrazole to increase covering power. The 5-mercaptotetrazole is additionally capable of increasing imaging speed and producing colder image tones when provided with a phenyl substituent in the 1 ring position, which phenyl substituent is in turn substituted in its para position with a substituent satisfying the formula R(OCH.sub.2 CH.sub.2).sub.n O-- wherein n is an integer of from zero to 5; when n is 1 to 5, R is hydrogen, methyl or ethyl; and, when n is zero, R is methyl.
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