Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/3029—Materials characterised by a specific arrangement of layers, e.g. unit layers, or layers having a specific function
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
  • G03C2001/7425—Coating on both sides
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C2200/00—Details
  • G03C2200/35—Intermediate layer

Definitions

• Double-sided photosensitive color paper and manufacturing method thereof Double-sided photosensitive color paper and manufacturing method thereof
• This invention relates to a photographic paper, and more particularly to a color photographic paper which can be imagewise formed on both sides, and a method of manufacturing such photographic paper. Background technique
• Photographic papers used for traditional photo printing are single-sided photographic papers that can only be exposed on one side.
• the photo paper is exposed to one side and placed on a single frame in a picture frame or album, which affects the use of photographic paper.
• the photographic paper 10 includes a paper base 11, a first photosensitive layer 12 and a first protective layer 13 disposed on one side of the paper base 11, and a other surface of the paper base 11
• the paper base 11 is a light blocking layer between the first photosensitive layer 11 and the second photosensitive layer 14.
• Each of the photosensitive layers 12 or 14 is composed of a red light sensitive layer, a green light sensitive layer and a blue light sensitive layer, respectively.
• the technical problem to be solved by the present invention is to provide a double-sided photosensitive color photographic paper capable of avoiding deterioration in image quality due to light projection at the time of double-sided light sensing.
• the present invention also provides a method of producing a double-sided photosensitive color photographic paper.
• the present invention adopts the above technical solution to make it silver opaque by setting compared with the prior art.
• the layer can avoid light transmission, so that the photosensitive layer that is not required to be exposed does not produce an undue image, so that a better image quality can be obtained.
• the silver in the silver light-blocking layer can be removed leaving a clear gelatin layer so as not to affect the final viewing quality of the photographic paper.
• FIG. 1 is a schematic view showing the structure of a conventional double-sided photosensitive paper.
• Figure 2 is a schematic view showing the photographic paper of Figure 1;
• FIG. 3 is a schematic view showing the structure of a double-sided photosensitive paper according to an embodiment of the present invention.
• FIGS. 4A and 4B are schematic views showing the photosensitivity of a double-sided photosensitive photographic paper according to an embodiment of the present invention.
• Figure 5 is a schematic view showing the structure of a double-sided photosensitive paper according to an embodiment of the present invention.
• Figure 6 is a schematic view showing the photosensitive of a double-sided photosensitive photographic paper according to another embodiment of the present invention.
• Figure 7 is a schematic illustration of a silver emulsion manufacturing process in accordance with an embodiment of the present invention.
• a double-sided photosensitive color photographic paper 20 includes a paper base layer 21, a first photosensitive layer 22, a first silver light-blocking layer 23, and a second photosensitive layer 24.
• the first photosensitive layer 22 is provided on one side of the paper base layer 21.
• the second photosensitive layer 24 is provided on the other side of the paper base layer 21.
• Each of the photosensitive layers 22 or 24 is further composed of a red light-sensitive layer, a green-sensitive layer, and a blue-sensitive layer, respectively.
• the red light layer, the green light layer and the blue light layer may be separated by an isolation layer, and the outermost red light layer may be provided with a protective layer.
• the first silver light blocking layer 23 is disposed between the paper base layer 21 and the first photosensitive layer 22.
• the first silver light-blocking layer 23 is formed by coating a silver-based light-blocking emulsion on the paper base layer 21, and the reflected light density is controlled to be 0.7 or more to block light from passing through the paper base layer and affecting the other side.
• the layer shall prevail.
• the main active ingredient of the silver-blocking emulsion is silver fine particles, and the solvent is, for example, photographic gelatin.
• the first silver light blocking layer 23 functions to block most of the light, and the light L2 is blocked.
• the light layer gradually attenuates, but is not sufficient to penetrate the paper base layer 21 and expose the second photosensitive layer 24 on the other side. therefore, Avoiding direct light causes the second photosensitive layer 24 to produce an undue image, which destroys the original image quality.
• the first silver light blocking layer 23 can also reduce the light reflection and diffusion L2' inside the first photosensitive layer 22 (please refer to the reflected light L 1 ' shown in FIG. 2), thereby improving the imaging definition of the photographic paper. .
• the first silver light-blocking layer 23 can gradually attenuate the light ray L2.
• the first photosensitive layer 22 of the face is exposed.
• a double-sided photosensitive color photographic paper 30 includes a paper base layer 31, a first photosensitive layer 32, a first silver light-blocking layer 33, a second photosensitive layer 34, and Two silver barrier layers 35.
• the first photosensitive layer 32 is provided on one side of the paper base layer 31.
• the second photosensitive layer 34 is provided on the other side of the paper base layer 31.
• Each of the photosensitive layers 32 or 34 may be further composed of a red light-sensitive layer, a green-sensitive layer, and a blue-sensitive layer, respectively.
• the first silver light blocking layer 33 is disposed between the paper base layer 31 and the first photosensitive layer 32.
• the second silver barrier layer 35 is disposed between the paper base layer 31 and the second photosensitive layer 32.
• the first silver light-blocking layer 33 and the second silver light-blocking layer 35 are respectively formed by coating a silver-based light-blocking emulsion on the paper base layer 21, and the first silver light-blocking layer 33 and the second silver light-blocking layer 33 are blocked.
• the reflective optical density of layer 35 is controlled to be above 0.4 to prevent light from reaching the photosensitive layer on the other side.
• the reflected light densities of the first silver light-blocking layer 33 and the second silver light-blocking layer 35 may be the same or different.
• the combination of the first silver light blocking layer 33 and the second silver light blocking layer 35 may be Block most of the light.
• part of the light is blocked by the first silver light blocking layer 33, that is, the remaining light L3 is incident on the second silver light blocking layer 35 through the paper base layer 31, and is also absorbed by the second silver light blocking layer 35. It is not exposed to the second photosensitive layer 24 on the other side. Therefore, direct light is prevented from causing the second photosensitive layer 24 to produce an undue image, which destroys the original image quality.
• the first silver light-blocking layer 33 can also reduce the light reflection and diffusion L3' in the inner portion of the first photosensitive layer 32 (please refer to the reflected light L1' shown in Fig. 2), thereby improving the imaging sharpness of the photographic paper.
• a paper base layer 21 is provided;
• a silver emulsion is coated on one side of the paper base layer 21 to form a first silver light blocking layer 23, and the reflected light density of the first silver light blocking layer 23 is controlled to be 0.7 or more; Then, an emulsion is coated on the silver light blocking layer 23 to form a first photosensitive layer 22;
• a paper base layer 31 is provided;
• a silver emulsion is coated on one side of the paper base layer 31 to form a first silver light blocking layer 33, and the reflected light density of the first silver light blocking layer 33 is controlled to be 0.4 or more;
• a silver emulsion is applied on the other side of the paper base layer 31 to form a second silver light-blocking layer 35, and the reflected light density of the second silver light-blocking layer 35 is controlled to be 0.4 or more;
• the manufacturing process of the above silver-blocking emulsion layer is as follows:
• the main raw materials include: silver nitrate (AgN0 3 ); sodium oxide (NaCl) and potassium bromide (KBr); developer, including hydroquinone and metol (p-methylphenol sulfate); and photographic gelatin .
• the first is to use a solution of AgN0 3 (from dissolution pot 41) with a concentration of about 10%, and a developer solution (from dissolution pot 42) with a ratio of benzenediol:metel at 1:1, together with a quantitative proportional addition.
• the reaction pot 40 of 3% photographic gelatin, NaCl and KBr solution was stirred with a motor 43, and emulsified and matured.
• the reaction process is as follows:
• Red is a reducing agent (developer) and OX is an oxidation product of a developer.
• Silver emulsions contain Ag and photographic gelatin and may contain small amounts of Ag0.
• the second is the bleaching liquid bleaching:
• the Ag of the silver light-blocking layer (23, 33, 35) and the Ag and Ag + in the photosensitive layer (22, 24, 32, 34) are common.
• the bleaching solution includes a bleaching agent and a fixer.
• the bleaching agent converts the developed metal silver (Ag) into an ionic state (Ag + ), and the reaction process is as follows:
• OX is the oxidant and Red is the reduction product of the oxidant.
• the fixer in the solution forms a complex of soluble silver with silver ions (Ag + ), and the fixer also dissolves the undeveloped silver halide (AgX) remaining in the photographic paper.
• the reaction process is as follows:
• water washing is performed to wash away impurities remaining in the emulsion layer, such as a complex of a bleaching solution and silver.
• the silver light-blocking layer described above becomes a colorless and transparent gelatin layer after removing the Ag particles, so that the image quality of the photosensitive layer is not affected by the silver light-blocking layer.
• the silver in the silver barrier layer can be removed without affecting the final viewing quality of the photographic paper.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Laminated Bodies (AREA)

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• 2008
  • 2008-06-16 CN CN200810038976A patent/CN101609251B/zh active Active
• 2009
  • 2009-05-25 EP EP09765358A patent/EP2290444A4/en not_active Withdrawn
  • 2009-05-25 US US12/999,584 patent/US20110086317A1/en not_active Abandoned
  • 2009-05-25 JP JP2011512817A patent/JP2011524543A/ja active Pending
  • 2009-05-25 WO PCT/CN2009/071942 patent/WO2009152719A1/zh not_active Ceased

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