Patent ID: 6465162
Filing Date: 2002-10-15
Classification: G03C

Abstract:
A photothermographic material comprising a support having on one side thereof, one or more layers comprising a binder, and in reactive association:(a) a photocatalyst, (b) a non-photosensitive source of reducible silver ions, and (c) a reducing agent composition for said reducible silver ion, said material further comprising either in one or more backside layers on the opposite side of said support, or in a layer associated with one of said backside layers, one or more image stabilizing compounds that are present in an amount sufficient to provide an increase in blocking power of at least 0.01 in the combination of said support and said one or more backside layers, wherein blocking power is defined by the following Equation I: blocking&it;â€ƒ&it;power=-&Integral;320430&it;Î±&it;â€ƒ&it;(Î»)&it;â€ƒ&it;j&it;â€ƒ&it;(Î»)&it;â€ƒ&it;&dd;Î»&Integral;320430&it;j&it;â€ƒ&it;(Î»)&it;â€ƒ&it;&dd;Î»&it;â€ƒ&it;&NewLine;&it;Î±&it;â€ƒ&it;(Î»)=-log&it;â€ƒ&it;(10-A&it;â€ƒ&it;(Î»)+0.01)Equation&it;â€ƒ&it;Iwherein &lgr; is the spectral wavelength in nanometers (nm), j(&lgr;) is the irradiance spectrum (W/cm2/nm) of a light box, and A(&lgr;) is the absorbance spectrum of the combination of said support and said one or more backside layers.