STABILIZATION OF LATENT IMAGES IN PHOTOTHERMOGRAPHIC ELEMENTS

摘要

A photothermographic element comprising a binder, light sensitive silver halide in catalytic proximity to a light insensitive silver source material in said element which contains a reducible source of silver ions, a reducing agent for silver ion and an effective latent image stabilizing amount of a compound of the formula

wherein
R<1> and R<4> are independently selected from hydrogen and alkyl groups of 1 to 4 carbon atoms,
R<2> and R<3> are independently selected from hydrogen and alkyl groups of 1 to 4 carbon atoms, and
n is zero or a positive whole integer between 1 and 4.
The presence of the latent image stabilizer reduces latent image fade.