Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Antihalation or filter layer containing
Patent
1995-12-22
1998-03-03
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Antihalation or filter layer containing
430510, 430517, 430511, 430512, 430554, 430558, 430523, 430524, 430525, 430527, 430531, G03C 106, G03C 1815, G03C 1825
Patent
active
057232725
ABSTRACT:
Silver halide light sensitive photographic elements comprising a support bearing on one side thereof at least one blue-sensitive silver halide emulsion yellow-image forming layer, at least one red-sensitive silver halide emulsion cyan-image forming layer, at least one green-sensitive silver halide emulsion magenta-image forming layer, and an antihalation layer comprising a cyan filter dye coated between the support and the red-sensitive layer, wherein the green-sensitive layer comprises a four equivalent magenta image forming coupler and the cyan filter dye is of the formula (I): ##STR1## where L.sup.1, L.sup.2, L.sup.3, L.sup.4 and L.sup.5 are methine groups; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently H or alkyl or aryl groups; and M.sup.+ is H or a counter ion; wherein at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 comprises an aryl group substituted with a substituent having a .pi. value of less than -0.10, where .pi. represents the group substituent component of the hydrophobicity parameter logP. In a preferred embodiment of the invention, R.sup.3 and R.sup.4 are each H, and R.sup.1 and R.sup.2 are each phenyl groups substituted with one or more substituents, where the sum of the .pi. values for the substituents on each of the R.sup.1 and R.sup.2 phenyl groups is less than -0.10 at pH above 8. Photographic elements in accordance with the invention exhibit reduced dye stain after photographic processing, resulting in lower red minimum densities. Such elements also exhibit higher maximum densities, upper scale contrasts, and relative speeds compared to prior art materials. Elements in accordance with preferred embodiments of the invention exhibit improved safelight performance.
REFERENCES:
patent: 4203769 (1980-05-01), Guestaux
patent: 4275103 (1981-06-01), Tsubusaki et al.
patent: 4394441 (1983-07-01), Kawaguchi et al.
patent: 4416963 (1983-11-01), Takimoto et al.
patent: 4418141 (1983-11-01), Kawaguchi et al.
patent: 4431764 (1984-02-01), Yoshizumi
patent: 4495276 (1985-01-01), Takimoto et al.
patent: 4571361 (1986-02-01), Kawaguchi et al.
patent: 4770984 (1988-09-01), Ailliet et al.
patent: 4895786 (1990-01-01), Kurematsu et al.
patent: 4956269 (1990-09-01), Ikeda et al.
patent: 4999276 (1991-03-01), Kuwabara et al.
patent: 5006451 (1991-04-01), Anderson et al.
patent: 5122445 (1992-06-01), Ishigaki
patent: 5213956 (1993-05-01), Diehl et al.
patent: 5221598 (1993-06-01), Anderson et al.
patent: 5326686 (1994-07-01), Katoh et al.
patent: 5346810 (1994-09-01), Ohno
patent: 5368995 (1994-11-01), Christian et al.
patent: 5399690 (1995-03-01), Diehl et al.
patent: 5451494 (1995-09-01), Diehl et al.
Barber Gary Norman
Helber Margaret Jones
Anderson Andrew J.
Eastman Kodak Company
Letscher Geraldine
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