Photosensitive microcapsule imaging system having improved gray scale

• Main Authors: HAMMANN, IV; WILLIAM A, GOTTCHALK; PETER, DOWLER; JAMES A
• Format: Patent
• Language: English
• Published: 16.06.1992
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; MATERIALS THEREFOR; ORIGINALS THEREFOR; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS

A photosensitive material includes a support having microcapsules and a color correction dye on its surface. The microcapsules include first, second and third sets of microcapsules, each set containing an internal phase. The first set of microcapsules is sensitive to red light and is associated with a cyan image-forming agent, the second set of microcapsules is sensitive to green light and is associated with a magenta image-forming agent, and the third set of microcapsules is sensitive to blue light and is associated with a yellow image-forming agent. The cyan, magenta and yellow image forming agents are respectively soluble in the internal phases of the first, second and third sets of microcapsules whereas the color correction dye is insoluble in the internal phase. The first, second and third sets of microcapsules are present in one or more layers containing a binder on the surface of the support. The color correction dye absorbs at least one of red, green, and blue light. The color correction dye is present in the binder of the one or more layers of microcapsules or is present in a separate layer containing a binder such that the film speed of at least one of the first, second and third sets of microcapsules is reduced and thereby the photosensitive material exhibits improved gray scale.