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Processing photographic materials and processing system therefor

A photographic material and system technology, applied in silver salt photosensitive material technology, photosensitive material, nuclear engineering, etc., can solve the problems of reducing stains, stain-removing agents are not very soluble in developing solutions, etc.

Inactive Publication Date: 2001-04-11
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It was also found that the stain remover is not very soluble in the developer solution and tends to precipitate out
A stain remover can be added to a bleach-fix solution to have a stain reducing effect, but it is even more prone to settling than in a developer

Method used

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  • Processing photographic materials and processing system therefor
  • Processing photographic materials and processing system therefor
  • Processing photographic materials and processing system therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Table 1

[0028] Short processing cycle (seconds) temperature (°C)

[0029] Develop 15 40

[0030] Bleach-fix 15 40

[0031] Washing for the first time 5~20 37

[0032] Main wash 15 37

[0033] The developer used is Kodak (registered trademark) Ekta Color SM (registered trademark) developer, and Kodak Ekta Color SM bleach solution (pH 6.3) for bleaching and fixing. The photo paper used is Ekta Color Edge7. The first water wash included 2g / l and 8g / l water check solution and Phorwite REU solution. Phorwite REU is an optical brightener. The reference machining cycle is shown in Table 2.

[0034] Table 2

[0035] Long processing cycle (seconds) temperature (°C)

[0036] Development 45 37.8

[0037] Bleaching-fixing 45 37.8

[0038] Washed 90 35

[0039] The developer used is Kodak (registered trademark) RA-12 developer, bleach-fixing Kodak RA-12 bleach solution. This process gave reference values ​​for CIELAB smear measurements for Koda...

Embodiment 2

[0053] This example demonstrates the benefit of washing with water at higher temperatures.

[0054] In this example, harsher wash conditions were deliberately used to check the effect of wash water temperature on the amount of stain in color paper. The processing cycles used are shown in Table 5.

[0055] table 5

[0056] Short processing cycle (seconds) temperature (°C)

[0057] Develop 15 40

[0058] Bleaching-fixing (PH5.4) 15 40

[0059] Washing 30 21~55

[0060] The developer used was Kodak Exta Color SM Developer, and the bleach-fix was Kodak Exta Color SM Bleach-Fix (PH 5.4). This condition had a lower pH in the bleach-fix solution than Example 1, which, in combination with the 30 second water wash, resulted in a worse stain profile than the reference. The photo paper used is Ekta Color Edge7.

[0061] Depend on figure 1 It can be seen that as the temperature increases from 22°C to 55°C, b * The average drop was over 1 unit...

Embodiment 3

[0062] Embodiment 3 according to the present invention

[0063] In this example, Phorwite REU was in the first wash tank and the main wash was tested at two different temperatures with the cycle times shown in Table 6.

[0064] Table 6

[0065] Short processing cycle (seconds) temperature (°C)

[0066] Develop 15 40

[0067] Bleaching-fixing (PH5.4) 15 40

[0068] Washing for the first time 5~20 40

[0069] Main Wash 15 37 and 56

[0070] The results are listed in Table 7.

[0071] Table 7 Effect of Phorwite and Final Washing Temperature Samples First Washing Solution Washing Temperature First Washing Total Washing L a * b *

[0072] Time (seconds) Refer to Table 2 for time (seconds). 2g / l) 56 5 20 90.2493 0.149 -0.964147-15 REU (2g / l) 37 10 25 89.95 0.270 -0.512147-19 REU (2g / l) 56 10 25 90 .314 0.086 -0.712

[0073] The data in Table 7 shows that when the final wate...

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Abstract

A process for the processing of an imagewise exposed photographic material which has been subjected to development and bleach-fixing comprises a plurality of sequential washing steps and where a stain reducing agent is employed wherein the photographic material is contacted with an effective amount of the stain reducing agent in the wash liquid in a first washing step and the photographic material is subjected to a following washing step to remove the stain reducing agent. The process may employ a plurality of wash tanks in which the developed material is washed sequentially and the stain reducing agent is present in the wash liquid in a first wash tank and removed from the photographic material by the wash liquid in one or more following wash tanks. The temperature of wash liquids in the tanks is preferably within the range 40 to 70° C., preferably 45 to 65° C.The invention includes a photoprocessor system for the processing of photographic materials for example film or paper comprising: a development tank associated with a bleach-fix tank which is associated with a first of a plurality of wash tanks connected in series and wherein there is provided a reservoir for a stain reducing agent and means for supplying the stain reducing agent to the first wash tank.

Description

field of invention [0001] The invention relates to the processing of photographic material and its processing system. Background of the invention [0002] In the processing of photographic materials, such as paper and film, it is sometimes found that smudges appear in the developed material. Staining is mainly due to the retention of sensitizing dyes. In the case of short-cycle fast processing that has been developed, the duration of the individual steps of development, bleach-fixing and washing is correspondingly shortened, making the risk of spotting even higher. [0003] The problem to be solved by the present invention [0004] Certain chemicals are known in the art as stain reducing agents, have previously been used to reduce stains and have been proposed to be added to developer solutions. However, it has been found that when the water wash time is short, for example about 15 seconds, smearing still occurs on the developed material. The present inventors have found...

Claims

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Application Information

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IPC IPC(8): G03C11/00G03C5/26G03C7/30G03D3/06
CPCG03D3/06Y10S430/134G03C5/268G03C7/3046G03C2001/0158
Inventor P·J·特维斯特
Owner EASTMAN KODAK CO
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