ELECTROPHORETIC MIGRATION IMAGING PROCESS WITH NEUTRAL DENSITY BISAZO NAPHTHALENEDIOL PIGMENTS

摘要

ELECTROPHORETIC MIGRATION IMAGING PROCESS WITH NEUTRAL DENSITY BISAZO PIGMENTS of the Invention An improved electrophoretic imaging process is provided wherein the improvement comprises the use of electrostatic charge-bearing particles having an electrically photosensitive pigment which is the reaction product of 2,3naphthalenediol and a diazonium salt. Preferred pigments have the following structure: wherein: R1 is a lower alkoxy group or -OCH2CONH2; R2 is H or NO2; and R3 is H or -SO2NH2.