Radiation imagery chemistry: process – composition – or product th – Regenerating image processing composition – Developer
Patent
1996-09-25
1997-11-11
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Regenerating image processing composition
Developer
430398, G03F 732
Patent
active
056862318
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
The present invention relates to a process for disposing of a waste developer generated after a developing process of an imagewise exposed pigment-containing non-silver-salt photo-sensitive material, an apparatus therefor and an automatic developing system having such an apparatus. More particularly the present invention relates to a process for disposing of a waste developer which is capable of lessening troubles associated with the insoluble matters and minimizing the amount of waste fluid, an apparatus therefor and an automatic developing system having such an apparatus.
BACKGROUND ART
In the conventional photo-sensitive material developing system in which a large number of imagewise exposed photo-sensitive materials are developed, it becomes impossible to conduct the satisfactory development due to fatigue of the developer as a result of gradual accumulation of the components of the photo-sensitive material eluted into the developer by repeating the developing process, due to the deactivation or oxidation of the developer by air, and due to other reasons such as evaporation of water from the developer during use. In the case of a pigment-containing non-silver-salt photo-sensitive material, since the component pigment is insoluble in the developer, this becomes a serious problem. This type of photo-sensitive material has involved various problems such as adhesion of the component pigment in the developer on the surface of the photo-sensitive material during the developing process and compaction of the piping in the developing system with the pigment.
Therefore, it has been necessary to supply the developer or an aqueous solution containing part of developer components in the course of the developing process, or to change the developer with fresh one after the developing process. However, the increase of the amount of the replenisher or the frequency of exchange of the developer entailed the problems of the corresponding increase of the amount of waste fluid and complication of the operations. There has popularly been used an automatic developing system for pre-sensitized planographic printing plates provided with a filter for removing dust or the developer components which have turned into sludge and become unable to stay dissolved in the developer. In the case of a pigment-containing non-silver-salt photo-sensitive material, however, it has been necessary to excessively increase the frequency of exchange of the filter because of a large amount of the substances to be removed such as pigment and an increased percentage of compaction of the filter. As a countermeasure against such compaction, it has been proposed to let the developer flow backward for removing dust in the filter (Japanese Patent Application Laid-Open (KOKAI) No. 2-1864), but this measure has not been so effective in the case of a pigment-containing non-silver-salt photo-sensitive material.
An object of the present invention is to solve the above-mentioned problems in the prior art, and to provide a developer disposing process which is capable of drastically reducing the amount of a waste developer by efficiently removing insoluble components composed principally of a pigment from a developer which has been used for developing a large number of pigment-containing non-silver-salt photo-sensitive materials, and recycling the obtained developer after removing the said insolubles; an apparatus used for this process; and an automatic developing system having such an apparatus.
The present inventors have made efforts for attaining the said object, and as a result, have found out a process which is substantially cleared of the said problems and capable of efficiently removing insoluble matters composed principally of a pigment, in the waste developer, and enables continuous developing operation in an industrially advantageous way for a long time. The present invention is attained based on this finding.
DISCLOSURE OF THE INVENTION
The present invention lies in a process for disposing of a waste developer used for a development
REFERENCES:
patent: 5077179 (1991-12-01), Abe et al.
patent: 5112491 (1992-05-01), Strantz, Jr.
patent: 5205937 (1993-04-01), Bhave et al.
patent: 5250396 (1993-10-01), Ueda et al.
patent: 5329331 (1994-07-01), Hatori et al.
Kaneda Takeshi
Kasakura Akeo
Le Hoa Van
Mitsubishi Chemical Corporation
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