| abstract |
A recording material employing at least one leuco dye having formula (I), which is colored when brought into contact with a color developer capable of inducing color formation in the leuco dye: <IMAGE> (I) wherein R1 and R2 each represent an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, an unsubstituted or substituted aralkyl group, or an unsubstituted or substituted aryl group, which R1 and R2 may form a ring in combination or a morpholine ring through an oxygen atom; R3 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or an aralkyloxy group; R4 and R5 each represent an alkyl group having 1 to 4 carbon atoms; and R6 represents hydrogen, an alkyl group having 1 to 4 carbon atoms or a halogen. |