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AssigneeCanon Kabushiki Kaisha
InventorsTaichi Shintou, Masahiro Suenaga, Koromo Shirota, Yuko Katsumoto, Tsuyoshi Santo, Hajime Muta, Tomoyuki Noda
Estimating the term…
In a thermal transfer recording sheet including a base material and a colorant layer, the colorant layer includes a yellow dye layer containing a yellow dye, a magenta dye layer containing a magenta dye, and a cyan dye layer containing a cyan dye, and the cyan dye includes a compound represented by Formula (1a) or Formula (1b): where R1 to R7 are substituents, X− is an anion, and the compound of Formula (1b) has at least one anionic substituent.
A thermal transfer recording sheet for forming process black by combining a yellow dye, a magenta dye, and a cyan dye, comprising:
A thermal transfer recording sheet for forming process black by combining a yellow dye, a magenta dye, and a cyan dye, comprising:
A thermal transfer recording sheet for forming process black by combining a yellow dye, a magenta dye, and a cyan dye, comprising:
Dependencies are inferred from the claim text.
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Using chemical colour formers: organic colour formers, e.g. leuco dyes
Multicolour thermography: by thermal transfer of dyes or pigments
Characterised by the transferable dyes or pigments: dyes containing one or more carbon-to-nitrogen double bonds, e.g. azomethine
Dyes with anthracene nucleus not condensed with any other ring: amino-anthraquinones
About 11 years 2 months of term left · ends 15 Dec 2037 (estimated)
The present disclosure relates to a thermal transfer recording sheet.
In recent years, due to the popularization of portable color display devices, demand for easily printing color photographs or documents photographed or produced with such devices is rapidly increasing. As color printing systems responding to such demand, for example, an electrophotographic system, an ink jet system, and a thermal transfer recording system are known. In particular, the thermal transfer recording system can perform printing by a dry process and is compact and excellent in portability as a printer and is therefore excellent as a method that allows easy printing regardless of the surrounding environment. In addition, since dyes are used as colorant, the system can express shades of an image by the density gradation of the color materials and is excellent in clearness and color reproducibility of an image.
The thermal transfer recording system is an image forming method by stacking, on a base material, a thermal transfer recording sheet having a colorant layer containing a heat-transferable dye and an image-receiving sheet having a surface provided with a dye-receiving layer and heating the thermal transfer recording sheet to transfer the colorant supported on the thermal transfer recording sheet to the image-receiving sheet to achieve recording.
The present disclosure will now be described in more detail.
The present inventors have diligently studied for solving the above-described problems and, as a result, have found that in a thermal transfer recording sheet including a base material and a colorant layer, when the colorant layer includes a yellow dye layer containing a yellow dye, a magenta dye layer containing a magenta dye, and a cyan dye layer containing a cyan dye and the cyan dye comprises a compound represented by Formula (1a) or Formula (1b), an image having compatibility between color gamut expansion in the blue direction and process black having a high optical density can be formed.
Cyan Dye