Photothermographic element having desired color
AssigneeEastman Kodak Company
InventorsCharles H. Weidner, Dorothy T. Java, Stephen A. Hershey, Elizabeth K. Priebe
Life of this patent
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Abstract
A photothermographic element comprises: (a) a support bearing on one surface thereof (b) a photosensitive emulsion layer (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 incorporated in the emulsion layer, in a polymer layer under the photosensitive layer, in the support, or in a backside polymer layer; and (d) one or more tinting dyes such that the final color space of the film lies within the range defined by 220°<hab<260°, where hab is the psychometric hue angle, hab=arctan(b*/a*), as defined in the CIELAB color system.
Claims16
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°<hab<260°, where hab is the psychometric hue angle, hab=arctan(b*/a*), as defined in the CIELAB color system,
- wherein the antihalation dye is of structure I:
- wherein:
- R1, R4, R5, R8, R9, R12, R13, R16 independently represent hydrogen, or substituted or unsubstituted, branched or unbranched alkyl of 1-10 carbons atoms;
- R2, R3, R6, R7, R10, R11, R14, R15 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 R1 and R2, R2 and R3, R3 and R4, R5 and R6, R6 and R7, R7 and R8, R9 and R10, R10 and R11, R11 and R12, R13 and R14, R14 and R15 and/or R15 and R16 taken together may represent the atoms necessary to form a substituted or unsubstituted 6 membered aromatic or heteroaromatic ring;
- and
- M 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.
Dependencies are inferred from the claim text.