Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1996-12-18
1997-11-04
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430517, 430519, 430522, 430591, G03C 140, G03C 183
Patent
active
056838603
ABSTRACT:
A silver halide light sensitive photographic element comprising a support bearing on one side thereof at least one light-sensitive silver halide emulsion layer, wherein the emulsion layer or a separate hydrophilic colloid layer of the element comprises a soluble absorber dye of the following formula (I): ##STR1## wherein each M is H or a counterion; each R.sup.1 and R.sup.2 independently represents H or a photographically acceptable substituent; m+p equals from 1 to 4; n+q equals from 1 to 4; and each of r and t represents from 0 to 3. In preferred embodiments of the invention, the element comprises at least one red-sensitive silver halide emulsion layer, and a dye of formula (I) is coated on the same side of the support as the red-sensitive emulsion layer. In particularly preferred embodiments, the element comprises a support bearing on the same side 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 a dye of the formula (I) is coated in at least one of the emulsion layers or a separate hydrophilic colloid layer on the same side of the support. Dyes of formula (I) typically provide substantial absorption at short red wavelengths below about 630 nm, and photographic elements in accordance with the invention accordingly exhibit effective safelight performance for commonly used safelights emitting in the range of 560-630 nm, such as those using a Kodak Safelight Filter No. 8.
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Dyes and Pigments, vol. 6 (1985), A.T.Peters , Ed., pp. 135-154, "Synthesis and Purification of Trisulphoindigo and Reversed-Phase High Performance Liquid Chromatographic Determination of Trisulphoindigo in FD&C Blue No.2", J.E.Bailey, Jr. and J.Travis.
Barber Gary N.
Beattie Linda J.
Diehl Donald R.
Anderson Andrew J.
Eastman Kodak Company
Schilling Richard L.
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