# US 5,352,559 A · Photosensitive sheet and a method for the formation of images using the same

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- Number: US 5,352,559 A
- Document ID: US5352559A
- Status: Granted
- Kind: A
- Application number: 07/984,257
- Filed: 1992-12-01
- Granted: 1994-10-04
- Earliest claimed: 1987-07-10
- Assignees: Sharp Kabushiki Kaisha
- Inventors: Yoshiharu Tsujimoto; Kunio Ohashi; Yoshikazu Fujiwara; Hiromu Sasaki; Syoichi Nagata
- Web page: https://patentgrep.com/patent/US5352559A

## CPC

- G03F 7/002: {using materials containing microcapsules; Preparing or processing such materials, e.g. by pressure; Devices or apparatus specially designed therefor}
- Y10S 430/116: Redox or dye sensitizer
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A photosensitive sheet comprising a sheet-shaped substrate, one surface of which is coated with a light-reflective substance or which is made of a light-reflective substance, and pressure-rupturable capsules that coat the light-reflective surface of the substrate or the other surface of the substrate, the pressure-rupturable capsules containing chromogenic materials and photosensitive materials that are hardened when illustrated with light, and a method for the formation of images using the said photosensitive sheet.

## Claims

### Claim 1

A photosensitive sheet for recording a color image, consisting essentially of:
a sheet-shaped substrate having first and second opposed surfaces, including on said second opposed surface at least one light-reflective surface to reflect light,
said light-reflective surface absorbing at least one component of the red, green, and blue components of the exposed light, said light-reflective surface reflecting light different from said exposed light in at least one of said red, green, and blue light components, to compensate the sensitivities of three kinds of photosensitive materials to substantially the same extent; and
a coating on said first opposed surface of said sheet-shaped substrate of three kinds of pressure-rupturable capsules, each of said three kinds of capsules containing one kind of colorless chromogenic material and one kind of photosensitive material,
said photosensitive materials selected from the group consisting of photosensitive materials individually sensitive to red, green, and blue light, and said photosensitive materials adapted to harden when exposed to light passing directly through said pressure-rupturable capsules or reflected light from said light-reflective substrate surface through said pressure-rupturable capsules.

### Claim 2 (depends on 1)

A photosensitive sheet according to claim 1, wherein said chromogenic substance contained in each pressure-rupturable capsules give rise to a color that is a complementary color of the light sensitive to each photosensitive materials contained in the capsule.