(57) Improved imaging compositions and film are provided that employ a tellurium imaging
compound, a reductant precursor, a masked reducing a agent, a source of labile hydrogen
and an organic compound that improves the speed, developed optical density and/or
background fog. These organic compounds include the following:


 where R1 and R6 each and independently are hydrogen, alkyl of three carbons or less, hydroxyl, phenyl,
benzyl or alkoxy of three carbons or less, R', R3, R4, R5, R7 and R8 each and independently are hydrogen, alkyl of three carbon atoms or less, phenyl
or benzyl; and compounds of the formulae:
 where R9, R10, R" and R" each and independently are hydrogen, alkyl of three carbon atoms or less,
phenyl, benzyl, methylene, ethylidene or propylidene.
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