| (19) |
 |
|
(11) |
EP 0 796 742 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.02.1998 Bulletin 1998/06 |
| (43) |
Date of publication A2: |
|
24.09.1997 Bulletin 1997/39 |
| (22) |
Date of filing: 18.03.1997 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
19.03.1996 JP 63423/96
|
| (71) |
Applicant: FUJI PHOTO FILM CO., LTD. |
|
Kanagawa (JP) |
|
| (72) |
Inventor: |
|
- Washizu, Shintaro
Fujinomiya-shi,
Shizuoka-ken (JP)
|
| (74) |
Representative: Bubb, Antony John Allen et al |
|
GEE & CO.
Chancery House
Chancery Lane
London WC2A 1QU
London WC2A 1QU (GB) |
|
| |
|
| (54) |
Infrared laser heat sensitive recording material |
(57) An infrared laser heat sensitive recording material is provided which includes a
support and a heat sensitive layer provided thereon. The heat sensitive layer includes
an organic silver salt, a developer for the organic silver salt, a water soluble binder,
and a tricarbocyanine dye having at least two acidic groups whose maximum absorption
wave length is at least 50 nm longer than a maximum absorption wave length of an aqueous
solution of the tricarbocyanine dye and is in a range of 650 to 1300 nm. The present
invention increases infrared laser light absorption efficiency, reduces degree of
coloration of background, and enables recording of images with good quality.