Color photothermography

A method of creating a color image of a photographic subject comprising

• mounting in a camera a photothermographic film comprised of a support and a photographically responsive, thermally developable panchromatically sensitized emulsion layer unit containing
• radiation-sensitive silver halide grains, at least 50 percent of the grains on a projected area basis being accounted for by tabular grains,
• a plurality of spectral sensitizing dyes adsorbed to the surface of the radiation-sensitive silver halide grains chosen to provide light sensitivity in the blue, green and red portions of the spectrum,
• a light-insensitive, reducible source of silver,
• a development component capable of providing a dye image, and
• a hydrophilic colloid vehicle,
• exposing the emulsion layer unit in a first image capture area to blue light received from the photographic subject to create a latent image of blue light exposure,
• exposing the emulsion layer unit in a second image capture area to green light received from the photographic subject to create a latent image of green light exposure,
• exposing the emulsion layer unit in a third image capture area to red light received from the photographic subject to create a latent image of red light exposure,
• thermally processing the photothermographic clement to produce images of the same hue in each of the first, second and third image capture areas,
• converting each of the images of blue, green and red light exposures into a corresponding additive or subtractive primary hue, and
• integrating the primary hue images to provide a positive or negative color image of the photographic subject.