Dry silver systems with fluoran leuco dyes

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430201, 430224, 430402, 430542, 430565, G03C 554, G03C 726

Patent

active

051852314

ABSTRACT:
Certain fluoran dyes have been found to be effective reducing agents for silver ion in dry silver constructions. The fluoran dyes have the following structure: ##STR1## wherein: R.sup.1 represents methyl or n-butyl;

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