Photographic imaging processing method

Abstract

The invention relates to the technical field of photography process, and discloses a photography imaging processing method. Compared with the original process flow and the existing Dalgol silver plate method manufactured by using silver mirror reaction in the market, the method provided by the invention has the advantages that the process flow is simple; the method provided by the invention has the advantages that polishing is not needed (glass or plastic is used, and the surface of the glass or plastic is smooth enough), the base material is not limited (thermal evaporation type vacuum plating does not need the base material to be conductive or magnetic), the smoothness is high (the vacuum coating technology does not introduce new roughness, and only depends on the smoothness of the base material); the method has the advantages of high plating firmness (the combination plating of vacuum coating after the base material is thoroughly cleaned is higher than that of silver mirror reaction), simple operation (the coating process is automatic in procedure and does not need tedious steps of polishing, gold plating and the like), non-toxicity (mercury development is not used), low cost (gold chloride gold plating, polishing consumables and copper plates are not used) and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic process, and particularly relates to a method for photographic imaging processing. Background Art

[0002] The traditional Daguerreotype was the first mature and usable photographic technique invented by Louis Daguerre in 1839. Its technological process can be briefly described as follows: 1. Initial polishing: Polish the copper plate to a mirror surface. 2. Silver plating: Electroplate a layer of silver on the copper plate using electroplating. 3. Fine polishing: Polish the silver coating again until it is a mirror surface. 4. Sensitization: Place the silver-plated copper plate in a container filled with iodine vapor, and fumigate the silver plate with iodine vapor to generate a silver iodide photosensitive layer. 5. Exposure: Put the photosensitized silver plate into the camera and take an exposure. 6. Development: Put the exposed silver plate into a sealed box containing mercury, heat the box to generate mercury vapor, and use the mercury vapor reaction for development. 7. Fixing: Put the developed silver plate into hot concentrated brine or a 5% concentration sodium sulfite solution for fixing, and then wash it clean with water. 8. Protection: Heat the silver plate on a heat source (such as an alcohol lamp), and at the same time spray a 1% concentration gold chloride solution until the tone changes to form a gold-plated protective layer to prevent oxidation, then remove the heat source and wash it clean.

[0003] The images produced by the above solution are clear, delicate, and can be preserved for a long time, but the shooting process is time-consuming and laborious: The polishing process usually takes several hours and requires a large amount of polishing liquid, which is not environmentally friendly. The development process requires the use of mercury, which is highly toxic and has a high risk factor. The protection process requires the use of gold chloride, which is costly and uncontrollable, and has a high operation difficulty. It is not conducive to a large number of photography enthusiasts in today's society, especially classical process enthusiasts, to operate.

[0004] Therefore, the technical solution of the present invention is improved on the basis of the original process, so as to greatly reduce the cost, toxicity, and process complexity without reducing the original picture quality, in order to improve the shooting flexibility and facilitate more photography enthusiasts and classical process photographers to use this process for creation.

[0005] And, up to now, this process still has the following problems that need to be further improved and studied:

[0006] 1. When using glass as the substrate, the bonding degree between the silver coating and the glass is not high, and occasionally it is easy to cause film peeling when entering the fixing solution in the later stage.

[0007] 2. When using a vacuum coating machine, if plating small-sized (size less than 4×5 inches) silver plates in large quantities (more than 10 at the same time), the utilization rate of silver will be reduced, resulting in an increase in cost. Summary of the Invention

[0008] Objective of the present invention: Based on the above technical problems, a method for photographic imaging processing is provided.

[0009] To achieve the above object, a first aspect of the present invention provides a method for photographic imaging processing, the method comprising the following steps:

[0010] (1) Perform silver plating on a substrate to obtain a silver plate having a structure of a silver layer - substrate from top to bottom and a silver layer thickness of 200 - 800 nm;

[0011] (2) Perform iodine fuming on the silver plate to obtain an intermediate I having a silver iodide photosensitive layer;

[0012] (3) Place the intermediate I into a camera for exposure processing to obtain an intermediate II;

[0013] (4) Moisten the intermediate II with distilled water, and then place it in a tray containing a fixing solution for fixing processing to obtain an intermediate III;

[0014] (5) Rinse the intermediate III thoroughly with distilled water, and use compressed air at a temperature of 22 - 27 °C and a pressure of 0.8 MPa to blow dry the water film on the surface of the rinsed intermediate III. At this time, a clear and sharp image can be seen on the plate surface.

[0015] Preferably, in step (1), the conditions of the silver plating treatment satisfy: the vacuum degree is 2.0e - 2 pa, and the coating power > 100 w.

[0016] Further preferably, in step (1), the purity of silver in the silver layer ≥ 99.999%.

[0017] Preferably, in step (2), the conditions of the iodine fuming treatment satisfy: the temperature is 20 - 45 °C and the time is 10 - 300 s.

[0018] According to a particularly preferred specific embodiment, in step (3), in the exposure treatment, based on the illuminance measured at a distance of 50 cm from the lamp ≥ 14 eV, a dysprosium lamp with a power of 1.8 - 4 kw or an LED lamp with a power of 2 kw is used for the exposure treatment.

[0019] Preferably, the illuminance measured at a distance of 50 cm from the lamp is measured using a photographic light meter; the photographic light meter is preferably Sekonic 858d, Kenko KFM2200.

[0020] Further preferably, in step (3), the conditions of the exposure treatment satisfy: the illuminance is 10 - 16 eV and the exposure time is 3 - 15 min.

[0021] Preferably, in step (4), the fixing solution is a hypo solution with a concentration of 15 - 25 wt%.

[0022] Preferably, in step (4), the conditions for the fixing treatment are satisfied: the time is 10 min.

[0023] The method provided by the present invention has at least the following beneficial effects:

[0024] Compared with the original process flow and the existing daguerreotype method using silver mirror reaction on the market. The method provided by the present invention has the advantages of no need for polishing (using glass or plastic, whose surface is smooth enough), no limitation on the substrate (thermal evaporation vacuum plating does not require the substrate to be conductive or magnetic), high smoothness (vacuum coating technology does not introduce new roughness and only depends on the smoothness of the substrate), high firmness of the coating (the bonding strength of vacuum plating after thorough cleaning of the substrate is higher than that of silver mirror reaction), simple operation (the coating process is automatic and does not require cumbersome steps such as polishing and gold plating), non-toxic (no use of mercury for development), and low cost (no use of gold chloride for gold plating, no need for polishing consumables, no need for copper plates), etc. Specific embodiments

[0025] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0026] In the present invention, the process of iodine fuming treatment is a process with a very large adjustable range. The temperature is between 20 and 50 °C, and the time is between 10 and 300 s, which are all available intervals. They compensate each other, and the final judgment criterion for whether the iodine fuming is qualified is the color of the silver iodide layer rather than the time and temperature. The best is to reach golden yellow or magenta. Generally, at room temperature of 25 °C, the iodine fuming for one minute can reach magenta, and 45 s can reach yellow.

[0027] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, the raw materials are all commercially available products.

[0028] Example 1

[0029] This example is used to provide a method for describing the photographic imaging process of the present invention. The method includes the following steps:

[0030] (1) Select an acrylic board that does not require manual polishing as the substrate, and perform silver plating treatment on it to obtain a silver plate with a structure of silver layer - substrate from top to bottom and a silver layer thickness of 800 nm;

[0031] The conditions for the silver plating treatment are as follows: the vacuum degree is 2.0e-2 pa, and the coating power > 100 w; the purity of silver in the silver layer is 99.999%.

[0032] (2) Place the silver plate in an iodine fuming box for iodine fuming treatment to obtain intermediate I with a silver iodide photosensitive layer (showing magenta).

[0033] The conditions for the iodine fuming treatment are as follows: the temperature is 20 °C and the time is 45 s.

[0034] (3) Put the intermediate I into a camera and perform exposure treatment using a dysprosium lamp with a power of 4 kw to obtain intermediate II.

[0035] The conditions for the exposure treatment are as follows: the illuminance is 16 ev and the exposure time is 5 min.

[0036] (4) Moisten the intermediate II with distilled water, and then place it in a tray containing a fixing solution for fixing treatment to obtain intermediate III.

[0037] The fixing solution is a hypo solution with a concentration of 20 wt%; the conditions for the fixing treatment are as follows: the time is 5 min.

[0038] (5) Rinse the intermediate III thoroughly with distilled water, and use compressed air with a temperature of 27 °C and a pressure of 0.8 MPa to blow dry the water film on the surface of the rinsed intermediate III. At this time, a clear and sharp image can be seen on the plate surface.

[0039] Example 2

[0040] It is carried out according to the method of Example 1, except that: in step (2), the conditions for the iodine fuming treatment are as follows: the temperature is 50 °C and the time is 15 s; in step (3), an LED lamp with a power of 1 kw is used for exposure treatment; in step (3), the conditions for the exposure treatment are as follows: the illuminance is 12 ev and the exposure time is 10 min, and the remaining steps and parameters are the same as those in Example 1.

[0041] Example 3

[0042] It is carried out according to the method of Example 1, except that: in step (1), the silver layer thickness is 200 nm, and the remaining steps and parameters are the same as those in Example 1.

[0043] Example 4

[0044] It is carried out according to the method of Example 1, except that: in step (4), the fixing solution is a hypo solution with a concentration of 5 wt%, and the conditions for the fixing treatment are as follows: the time is 25 min, and the remaining steps and parameters are the same as those in Example 1.

[0045] Comparative Example 1

[0046] This example is carried out according to the method of Example 1. The difference is that in step (1), the silver plating treatment is carried out by electroplating, and the remaining steps and parameters are the same as those in Example 1.

[0047] Using this method: the quality of the coating (smoothness, purity, density) drops significantly, image details are lost, and the tonal levels become dull and lackluster. Moreover, the electroplated coating cannot directly produce a thick enough mirror coating, and further manual polishing of the coating is required, which is time-consuming and laborious.

[0048] Comparative Example 2

[0049] This example is carried out according to the method of Example 1. The difference is that in step (1), the silver plating treatment is carried out by silver mirror reaction, and the remaining steps and parameters are the same as those in Example 1.

[0050] For this method: the quality of the coating (smoothness, purity, density) drops significantly, image details are lost, and the tonal levels become dull and lackluster; mercury vapor development can reduce the exposure time, but it is highly toxic and the operation process is completely uncontrollable and can only rely on experience.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A method for photographic imaging processing, characterized in that, The method comprises the following steps: (1) Perform silver plating on a substrate to obtain a silver plate with a structure of a silver layer - substrate from top to bottom and a silver layer thickness of 200 - 800 nm; (2) Perform iodine fuming treatment on the silver plate to obtain Intermediate I with a silver iodide photosensitive layer; (3) Place Intermediate I into a camera for exposure treatment to obtain Intermediate II; (4) Moisten Intermediate II with distilled water, and then place it in a tray containing a fixing solution for fixing treatment to obtain Intermediate III; (5) Rinse Intermediate III thoroughly with distilled water, and use compressed air at a temperature of 22 - 27 °C and a pressure of 0.8 MPa to blow dry the water film on the surface of the rinsed Intermediate III. At this time, a clear and sharp image can be seen on the plate surface.

2. The method according to claim 1, wherein In step (1), the conditions for the silver plating treatment are as follows: the vacuum degree is 2.0e - 2 pa, and the coating power > 100 w.

3. The method according to claim 1, wherein In step (1), the purity of silver in the silver layer ≥ 99.999%.

4. The method according to claim 1, wherein In step (2), the conditions for the iodine fuming treatment are as follows: the temperature is 20 - 45 °C, and the time is 10 - 300 s.

5. The method according to claim 1, wherein In step (3), in the exposure treatment, based on the illuminance measured at a distance of 50 cm from the lamp ≥ 14 eV, use a dysprosium lamp with a power of 1.8 - 4 kw, or use an LED lamp with a power of 2 kw for the exposure treatment; And / or, the illuminance measured at a distance of 50 cm from the lamp is measured using a photographic light meter; the photographic light meter is preferably Sekonic 858d or Kenko KFM2200.

6. The method according to claim 1, characterized in that, In step (3), the conditions for the exposure treatment are as follows: the illuminance is 10 - 16 ev, and the exposure time is 3 - 15 min.

7. The method according to claim 1, characterized in that, In step (4), the fixing solution is a hypo solution with a concentration of 15 - 25 wt%.

8. The method according to claim 1, wherein In step (4), the conditions for the fixing treatment are as follows: the time is 10 min.