Black colored dye mixture for use according to thermal dye sublimation transfer
AssigneeAgfa-Gevaert
InventorsWilhelmus Janssens, Raymond Roosen, Modest Vereycken
Life of this patent
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Abstract
Black colored dye mixture for use in thermal dye sublimation transfer composed of at least four dyes and comprising two dyes having absorption maxima in the spectral range between 470 and 600 nm that are at least 30 nm apart from each other.
Claims13
Imaged element produced by thermal dye sublimation transfer printing comprising on a transparent support a black colored dye image consisting of a dye mixture comprising at least four dyes, said dye mixture comprising a magenta heterocyclic azo aniline dye having an absorption maximum in the spectral range between 500 and 600 nm, a cyan dye having an absorption maximum in the spectral range between 600 and 700 nm, a yellow dye having an absorption maximum in the spectral range between 400 and 470 nm and at least one other dye having an absorption maximum in the spectral range between 470 and 600 nm that is at least 30 nm distant from the absorption maximum of said magenta heterocyclic azo aniline dye, wherein said at least one other dye has the following general formula ##STR8## wherein each of R.sup.11 to R.sup.14 independently represent hydrogen, an alkyl group, a cycloalkyl group or an aryl group, or R.sup.11 and R.sup.12 and/or R.sup.13 and R.sup.14 may be joined to form a 5- or 6-membered heterocyclic ring system, or each of R.sup.11 to R.sup.14 independently can be joined to the carbon atom of the aromatic ring at a position ortho to the position of attachment of the anilino nitrogen to form a 5- or 6-membered ring;
- Z and Z' independently represent any substituent;
- n and n' independently represent 0, 1, 2, 3 or 4, the Z and Z' substituents respectively may be the same or different when n or n' respectively is greater than 1.
Black colored dye-donor element for use according to thermal dye sublimation transfer comprising a support having thereon a dye layer containing a black colored dye mixture said dye mixture comprising at least four dyes, said dye mixture comprising a magenta heterocyclic azo aniline dye having an absorption maximum in the spectral range between 500 and 600 nm, a cyan dye having an absorption maximum in the spectral range between 600 and 700 nm, a yellow dye having an absorption maximum in the spectral range between 400 and 470 nm and at least one other dye having an absorption maximum in the spectral range between 470 and 600 nm that is at least 30 nm distant from the absorption maximum of said magenta heterocyclic azo aniline dye, wherein said at least one other dye has the following general formula ##STR10## wherein each of R.sup.11 to R.sup.14 independently represent hydrogen an alkyl group, a cycloalkyl group or an aryl group, or R.sup.11 and R.sup.12 and/or R.sup.13 and R.sup.14 may be joined to form a 5- or 6-membered heterocyclic ring system, or each of R.sup.11 to R.sup.14 independently can be joined to the carbon atom of the aromatic ring at a position ortho to the position of attachment of the anilino nitrogen to form a 5- or 6-membered ring;
- Z and Z' independently represent any substituent;
- n and n' independently represent 0, 1, 2, 3 or 4, the Z and Z' substituents respectively may be the same or different when n or n' respectively is greater than 1.
Dependencies are inferred from the claim text.