Patent ID: 6174657
Filing Date: 2001-01-16
Classification: G03C

Abstract:
A photothermographic element comprising:(a) a support bearing on one surface thereof(b) a photosensitive emulsion layer comprising:(i) a binder;(ii) a light-insensitive organic silver salt,(iii) a reducing agent, and(iv) a photosensitive silver halide emulsion;(c) an antihalation dye; and(d) one or more tinting dyes such that the final color space of the element lies within the range defined by 220.degree.<h.sub.ab <260.degree., where h.sub.ab is the psychometric hue angle, h.sub.ab =arctan(b*/a*), as defined in the CIELAB color system,wherein the antihalation dye is of structure I: ##STR19##wherein:R.sub.1, R.sub.4, R.sub.5, R.sub.8, R.sub.9, R.sub.12, R.sub.13, R.sub.16 independently represent hydrogen, or substituted or unsubstituted, branched or unbranched alkyl of 1-10 carbons atoms;R.sub.2, R.sub.3, R.sub.6, R.sub.7, R.sub.10, R.sub.11, R.sub.14, R.sub.15 independently represent hydrogen, substituted or unsubstituted, branched or unbranched alkyl of 1-10 carbon atoms, substituted or unsubstituted aryl, halogen, substituted or unsubstituted alkoxyl of 1-10 carbons, substituted or unsubstituted aryloxy;or R.sub.1 and R.sub.2, R.sub.2 and R.sub.3, R.sub.3 and R.sub.4, R.sub.5 and R.sub.6, R.sub.6 and R.sub.7, R.sub.7 and R.sub.8, R.sub.9 and R.sub.10, R.sub.10 and R.sub.11, R.sub.11 and R.sub.12, R.sub.13 and R.sub.14, R.sub.14 and R.sub.15 and/or R.sub.15 and R.sub.16 taken together may represent the atoms necessary to form a substituted or unsubstituted 6 membered aromatic or heteroaromatic ring; andM is a multi-valent metal selected from: Mg, Ca, Sr, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, B, Al, Sn, Pb, Mo, Pd and Pt.