Thermal transfer recording sheet
AssigneeCanon Kabushiki Kaisha
InventorsMasao Nakano, Yuko Katsumoto, Taichi Shintou
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a thermal transfer recording sheet that enables high-chroma images to be formed, has a high color-developability that enables a wide color gamut to be achieved, and enables high-quality black images to be formed using process black. The thermal transfer recording sheet includes a base material, and a yellow dye layer including a yellow dye, a magenta dye layer including a magenta dye, and a cyan dye layer including a cyan dye that are disposed on the base material. The magenta dye, yellow dye, and cyan dye each contain specific compounds.
Claims7
A thermal transfer recording sheet comprising a base material and a colorant layer on the base material,
- wherein the colorant layer includes a yellow dye layer comprising a yellow dye, a magenta dye layer comprising a magenta dye, and a cyan dye layer comprising a cyan dye,
- the magenta dye containing a compound represented by General Formula (1),
- the yellow dye containing a compound represented by General Formula (2), and
- the cyan dye containing at least one compound selected from the group consisting of compounds represented by General Formulae (3) to (5),
- wherein, in General Formula (1),
- R1 and R2 each independently represent an alkyl group;
- R3 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, or an aryl group having a substituent;
- R4 represents an alkyl group, an aryl group having no substituents, or an aryl group having a substituent;
- and
- R5 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —N(—R6)R7, R6 and R7 each independently represent a hydrogen atom, an alkyl group, or an acyl group, and R6 and R7 may be bonded to each other to form a ring,
- wherein, in General Formula (2),
- R8 represents an alkyl group;
- R9 represents a hydrogen atom or an alkyl group;
- R10 represents an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or an amino group;
- R11 represents a hydrogen atom, a cyano group, a carbamoyl group, a carboxylic acid ester group, or a carboxylic acid amide group;
- R12 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —N(—R13)R14, R13 and R14 each independently represent a hydrogen atom, an alkyl group, or an acyl group, and R13 and R14 may be bonded to each other to form a ring;
- X represents a carbonyl group or a sulfonyl group;
- and
- n is an integer of 1 to 3,
- wherein, in General Formula (3), R15 to R19 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent,
- wherein, in General Formula (4), R20 and R21 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent, and
- wherein, in General Formula (5), R22 to R26 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent.
Dependencies are inferred from the claim text.