| (19) |
 |
|
(11) |
EP 0 772 085 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
21.05.1997 Bulletin 1997/21 |
| (43) |
Date of publication A2: |
|
07.05.1997 Bulletin 1997/19 |
| (22) |
Date of filing: 25.10.1996 |
|
| (51) |
International Patent Classification (IPC)6: G03C 7/44 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
31.10.1995 US 8159
17.01.1996 US 588033
|
| (71) |
Applicant: EASTMAN KODAK COMPANY |
|
Rochester,
New York 14650-2201 (US) |
|
| (72) |
Inventors: |
|
- Craver, Mary Ellen
Rochester,
New York 14650-2201 (US)
- Buongiorne, Jean Marie
Rochester,
New York 14650-2201 (US)
- Haight, Michael John
Rochester,
New York 14650-2201 (US)
|
| (74) |
Representative: Nunney, Ronald Frederick Adolphe et al |
|
Kodak Limited
Patent Department
Headstone Drive
Harrow
Middlesex HA1 4TY
Harrow
Middlesex HA1 4TY (GB) |
|
| |
|
| (54) |
Bleach regenerator composition and its use to process reversal color photographic
elements |
(57) A ferric-EDTA bleach regenerator composition can be mixed with bleach overflow to
provide a bleach replenisher for reversal color silver halide photographic processes.
The bleach regenerator composition has a critically controlled pH between 6.0 and
6.5, and comprises a total bromide ion concentration of at least 210 g/l, and ferric
ion in an amount of at least 50 g/l. At least 50% of the bleach overflow and the bleach
regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment
to from 5.4 to 5.6, the pH adjusted replenisher is supplied to the bleach tank for
use in the process.