Radiographic elements capable of rapid access processing modified to reduce red light transmission
AssigneeEastman Kodak Company
InventorsRobert E. Dickerson, Rickey J. Seyler
Life of this patent
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Abstract
A radiographic element is disclosed capable of producing a maximum density of at least 3.0 when imagewise exposed and processed in less than 45 seconds. The element includes magenta dye or dyes, including a dye for spectrally sensitizing radiation-sensitive silver halide grains, that leave a residual density at 505 nm of greater than 0.1 when the element is processed. Transmission of red light through the radiographic element when imagewise exposed and processed to produce a viewable image is reduced by the incorporation in at least one of the hydrophilic colloid layers of at least one ionic linear condensation polymer containing a cyan phthalocyanine dye.
Claims13
A radiographic element capable of producing a maximum density of at least 3.0 when imagewise exposed by X-radiation stimulated intensifying screen emission of green light and processed in less than 45 seconds, said element being comprised of
- a transparent film support having first and second major faces,
- a fully forehardened hydrophilic colloid layer unit coated on each major face of the support, at least one of the layer units including radiation-sensitive silver halide grains,
- one or a combination of magenta dyes, including a dye for spectrally sensitizing the radiation-sensitive silver halide grains to green light, said dyes leaving a residual density at 505 nm of greater than 0.1 when the element is processed in less than 45 seconds, and
- a blue dye that increases neutral density in minimum density areas after imagewise exposure and processing,
- WHEREIN, transmission of red light through the radiographic element when imagewise exposed and processed in less than 45 seconds to produce a viewable image is reduced by the incorporation in at least one of the hydrophilic colloid layers of at least one ionic linear condensation polymer containing a cyan phthalocyanine dye.
Dependencies are inferred from the claim text.