CN110161811B - Recyclable color developing solution - Google Patents
Recyclable color developing solution Download PDFInfo
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- CN110161811B CN110161811B CN201711414739.7A CN201711414739A CN110161811B CN 110161811 B CN110161811 B CN 110161811B CN 201711414739 A CN201711414739 A CN 201711414739A CN 110161811 B CN110161811 B CN 110161811B
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- developing
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- color
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
Abstract
The invention discloses a recyclable color developing solution, which consists of three concentrated solutions A, B and C, wherein the pH of the concentrated solution A is 9-11, and the concentrated solution A contains water, a solvent, a fluorescent whitening agent, a protective agent and a surfactant; the PH value of the concentrated solution of the part B is between 5 and 6, and the concentrated solution contains water, a protective agent and a color developing agent; the PH of the concentrated solution of the part C is between 12 and 13, and the concentrated solution of the part C contains water, a developing accelerator and a water softener; A. and sequentially adding the part B and the part C into water for dilution and dispensing. The invention has the advantages of minimum inhibition and strong oxidation resistance, and is suitable for the performance of a widely-used high-temperature rapid developing process of RA-4 color photographic paper; the developing solution utilizes chloride ions released in the flushing process to enable other components in the old solution to play a role again, thereby avoiding the pollution to the environment caused by the discharge of the developing waste liquid and enabling various effective components in the developing solution to be recycled.
Description
Technical Field
The invention relates to the technical field of post-processing of photosensitive materials, in particular to a color developing solution capable of being recycled when color photographic paper is developed and processed.
Background
Color photographic systems produce color images by exposing photosensitive materials containing silver chloride couplers to light and developing the color. The color developer converts the exposed silver chloride to metallic silver. The oxidation product of the silver halide and the silver halide respectively generates dyes with yellow, magenta and cyan couplers and releases metallic silver and chloride ions.
Metallic silver impairs the hue of the dye image and must be removed. The conversion of metallic silver to silver ions is the reverse reaction of the development process. The reverse reaction is carried out by bleaching agent in bleaching solution, which is polycarboxyl iron compound, ferric ethylenediamine tetracetate, which is an oxidant for metallic silver, and which oxidizes metallic silver into silver chloride. The ferric salt of the ethylenediaminetetraacetic acid is reduced to ferrous salt of the ethylenediaminetetraacetic acid.
Immediately after completion of the bleaching process, the ferric ethylenediaminetetraacetate ferrous iron is reduced to ferric ethylenediaminetetraacetate by combining with oxygen in the air:
thereby reciprocating and circulating.
Unexposed silver chloride still remains after color development of the color paper. These silver chlorides need to be dissolved and removed, and this process is a fixing process. The present technique employs a fast fixer thiosulfate. Fixing reaction process:
a certain amount of thiosulfate is consumed in the fixing process, and a certain amount of thiosulfate must be added to maintain the balance in order for the amount of thiosulfate to be constant.
In the process of processing color photographic paper, a large amount of developing solution is continuously brought into the bleaching solution by a wet sheet, and acid in the bleaching solution is continuously consumed in the process of flushing because the developing solution is alkaline solution. In order to maintain the acidity of the bleach liquor, a certain amount of acid must be added to maintain the equilibrium at a constant pH.
Chloride ion is a development inhibitor, and a chloride salt such as sodium chloride is usually added to the developer to generate chloride ion, which functions to inhibit the formation of development fog. The chlorine ions generated in the developing process are used for replacing the artificially added chlorine salt, so that the number of the chlorine ions reaches an equilibrium state. And (2) exposing the color photographic paper, then carrying out developing processing, allowing the photographic paper to enter a color developing solution, and allowing silver ions generated by exposure of silver chloride contained in an emulsion layer on the paper to react with a main component developer in the developing solution so as to convert the developer into semiquinone imine ions:
under the alkaline condition of the developer, the semiquinone imine ion becomes a semiquinone free radical after losing one hydrogen atom:
then, still under the alkaline condition of the developer, the semiquinone free radical reacts with another silver ion to be converted into quinone diimine:
quinone diimines and semi-quinone diimines may be interconverted structurally:
the colour former in the coating of colour photographic paper also dissociates under the alkaline conditioning of the developer to produce negative ions:
the negative ions of the color coupler react with the semi-quinone diimine with positive electricity to generate the dye leuco:
the leuco dye reacts with another half-quinone diimine to form dye
The dye thus produced is the substrate constituting the color image.
The existing color developing solution has poor inhibitive performance and oxidation resistance, the old solution can not be recycled, resources are wasted, and the emission of the developing waste liquid can cause pollution to the environment. Therefore, in response to the current situation, there is an urgent need to develop a recyclable color developer to overcome the shortcomings of the current practical applications.
Disclosure of Invention
The present invention is directed to a recyclable color developer solution to solve the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a color developing solution capable of being recycled consists of three concentrated solutions A, B and C, wherein the pH of the concentrated solution A is between 9 and 11, and the concentrated solution A contains water, a solvent, a fluorescent whitening agent, a protective agent and a surfactant; the PH of the part B concentrated solution is between 5 and 6, and the part B concentrated solution contains water, a protective agent and a color developing agent; the PH of the concentrated solution of the part C is between 12 and 13, and the concentrated solution of the part C contains water, a developing accelerator and a water softener; A. and sequentially adding the part B and the part C into water for dilution and dispensing.
As a further scheme of the invention: the solvent in the part A is triethanolamine, the fluorescent whitening agent is an s-triazine derivative whitening agent, and the surfactant is a polymer of phenol and ethylene oxide.
As a further scheme of the invention: the color developer in part B is a derivative of p-phenylenediamine.
As a further scheme of the invention: the developing accelerator in the part C is hydroxide and carbonate, and the water softener is polycarboxylic acid compound.
As a further scheme of the invention: the protecting agents in parts a and B are both sulfite and hydroxylamine derivatives.
As a further scheme of the invention: the color developing solution also contains aromatic.
As a further scheme of the invention: when the color developing solution is applied to a high-temperature rapid developing process of RA-4 color photographic paper, the pH value is required to be 10-11, the temperature is 37.8, and the developing time is 45 seconds.
As a further scheme of the invention: the container for holding the color developing solution which can be recycled and regenerated is sealed.
Compared with the prior art, the invention has the beneficial effects that: the color developing solution capable of being recycled and regenerated has the advantages of minimum inhibition and strong oxidation resistance, and is suitable for the performance of a widely-used high-temperature quick developing process of RA-4 color photographic paper; the developing solution utilizes chloride ions released in the flushing process to enable other components in the old solution to play a role again, thereby avoiding the pollution to the environment caused by the discharge of the developing waste liquid and enabling various effective components in the developing solution to be recycled.
Drawings
Fig. 1 is a schematic view of a developing process of a color photograph developing machine on the market.
FIG. 2 is a schematic flow chart of the present invention for recycling the developer solution for reuse in a color photo processor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a recyclable color developer is composed of three concentrated solutions a, B and C, wherein the concentrated solution of part a has a PH of 9 to 11 and contains water, a solvent, a fluorescent brightener, a protective agent and a surfactant, the concentrated solution of part B has a PH of 5 to 6 and contains water, a protective agent and a color developer, and the concentrated solution of part C has a PH of 12 to 13 and contains water, a development accelerator and a water softener; A. and sequentially adding the part B and the part C into water for dilution and dispensing.
In this embodiment, the solvent in the part a is triethanolamine, the fluorescent whitening agent is an s-triazine derivative whitening agent, and the surfactant is a polymer of phenol and ethylene oxide.
In this embodiment, the color developer in the B portion is a derivative of p-phenylenediamine.
In this example, the development accelerators in part C were hydroxide and carbonate, and the water softener was a polycarboxylic acid compound.
In this example, the protecting agents in parts a and B are both sulfite and hydroxylamine derivatives.
The recyclable color developing solution also contains an aromatic; the high-temperature rapid developing process for RA-4 color photographic paper requires that the pH value is 10-11, the temperature is 37.8, and the developing time is 45 seconds; in order to prevent the overflowing developing removal liquid and the prepared developing supplement liquid from contacting with air for a long time to generate oxidation reaction, the container needs to be sealed, and an appropriate amount of inert gas (such as argon, nitrogen and the like) can be filled into the container to slow down the oxidation process.
The color photographic paper is developed through three processes of developing, bleaching and water washing to obtain the exposed color photographic paper. The large and small color photo developing machines widely used in the market all adopt continuous developing and processing, namely, the process of continuously supplementing new liquid and abandoning waste liquid.
The color developing solution capable of being recycled and regenerated has the advantages of minimum inhibition and strong oxidation resistance, and is suitable for the performance of a widely-used high-temperature quick developing process of RA-4 color photographic paper; the developing solution utilizes the chloride ions released in the flushing process to enable other components in the old solution to play a role again, thereby avoiding the pollution to the environment caused by the discharge of the developing waste liquid and enabling various effective components in the developing solution to be recycled.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. A color developing solution capable of being recycled consists of three concentrated solutions A, B and C, and is characterized in that the pH of the concentrated solution A is between 9 and 11, and the concentrated solution A contains water, a solvent, a fluorescent whitening agent, a protective agent and a surfactant; the PH value of the concentrated solution of the part B is between 5 and 6, and the concentrated solution contains water, a protective agent and a color developing agent; the PH of the concentrated solution of the part C is between 12 and 13, and the concentrated solution of the part C contains water, a developing accelerator and a water softener; A. and sequentially adding the part B and the part C into water for dilution and dispensing.
2. The recyclable color developer according to claim 1, wherein the solvent in part a is triethanolamine, the fluorescent whitening agent is an s-triazine derivative type whitening agent, and the surfactant is a polymer of phenol and ethylene oxide.
3. The recyclable color developer according to claim 1, wherein the color developer in part B is a derivative of p-phenylenediamine.
4. The recyclable color developer according to claim 1, wherein the developing accelerators in part C are hydroxides and carbonates, and the water softener is a polycarboxylic acid compound.
5. The recyclable color developer according to claim 1, 2 or 3, wherein the protecting agents in parts A and B are both sulfite and hydroxylamine derivatives.
6. The recyclable color developer according to claim 1, further comprising an aromatic agent.
7. The recyclable color developing solution according to claim 1 or 6, wherein the color developing solution is applied to a high temperature fast developing process for RA-4 color photographic paper, and the pH value is 10-11, the temperature is 37.8, and the developing time is 45 seconds.
8. The recyclable color developing solution according to claim 1 or 6, wherein a container holding the recyclable color developing solution is subjected to sealing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711414739.7A CN110161811B (en) | 2017-12-25 | 2017-12-25 | Recyclable color developing solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711414739.7A CN110161811B (en) | 2017-12-25 | 2017-12-25 | Recyclable color developing solution |
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| Publication Number | Publication Date |
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| CN110161811A CN110161811A (en) | 2019-08-23 |
| CN110161811B true CN110161811B (en) | 2022-11-15 |
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| CN201711414739.7A Active CN110161811B (en) | 2017-12-25 | 2017-12-25 | Recyclable color developing solution |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046395A (en) * | 1990-05-28 | 1990-10-24 | 刘树斌 | Apparent fixing liquor and developing technique that colour negative and printing paper are general |
| US6017687A (en) * | 1999-03-15 | 2000-01-25 | Eastman Kodak Company | Low replenishment color development using chloride ion-free color developer concentrate |
| EP1383000A1 (en) * | 2002-07-19 | 2004-01-21 | Agfa-Gevaert | Colour photographic developing concentrate |
| CN104460245A (en) * | 2014-12-24 | 2015-03-25 | 保定乐凯照相化学有限公司 | Color photographic paper developing concentrated solution |
-
2017
- 2017-12-25 CN CN201711414739.7A patent/CN110161811B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046395A (en) * | 1990-05-28 | 1990-10-24 | 刘树斌 | Apparent fixing liquor and developing technique that colour negative and printing paper are general |
| US6017687A (en) * | 1999-03-15 | 2000-01-25 | Eastman Kodak Company | Low replenishment color development using chloride ion-free color developer concentrate |
| EP1383000A1 (en) * | 2002-07-19 | 2004-01-21 | Agfa-Gevaert | Colour photographic developing concentrate |
| CN104460245A (en) * | 2014-12-24 | 2015-03-25 | 保定乐凯照相化学有限公司 | Color photographic paper developing concentrated solution |
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| Publication number | Publication date |
|---|---|
| CN110161811A (en) | 2019-08-23 |
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