WO2010063212A1 - 一种双面感光彩色相纸 - Google Patents

一种双面感光彩色相纸 Download PDF

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Publication number
WO2010063212A1
WO2010063212A1 PCT/CN2009/074987 CN2009074987W WO2010063212A1 WO 2010063212 A1 WO2010063212 A1 WO 2010063212A1 CN 2009074987 W CN2009074987 W CN 2009074987W WO 2010063212 A1 WO2010063212 A1 WO 2010063212A1
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Prior art keywords
layer
double
light
solvent
photosensitive
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PCT/CN2009/074987
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English (en)
French (fr)
Inventor
李亚宁
杜彦飞
郭建国
王文桂
Original Assignee
中国乐凯胶片集团公司
乐凯胶片股份有限公司
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Application filed by 中国乐凯胶片集团公司, 乐凯胶片股份有限公司 filed Critical 中国乐凯胶片集团公司
Priority to ES09829996.9T priority Critical patent/ES2483769T3/es
Priority to EP09829996.9A priority patent/EP2372453B1/en
Priority to US13/132,113 priority patent/US8409791B2/en
Priority to JP2011538822A priority patent/JP5260754B2/ja
Priority to DK09829996.9T priority patent/DK2372453T3/da
Publication of WO2010063212A1 publication Critical patent/WO2010063212A1/zh

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    • 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
    • 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
    • G03C7/3041—Materials with specific sensitometric characteristics, e.g. gamma, density

Definitions

  • the present invention relates to a photographic material, and more particularly to a double-sided photosensitive color photographic paper. Background technique
  • Patent application No. ZL 200520023024. 5 discloses a double-sided exposure laser printer and a double-sided photosensitive paper used, wherein the exposure unit is provided with a symmetrically mounted laser exposure device on the upper and lower sides of the exposure area. Under the control of the scanning signal outputted by the circuit control unit, the laser exposure device respectively performs exposure imaging on both sides of the double-sided photographic paper, and the photographic paper is finished by the rinsing unit to realize double-sided imaging.
  • the double-sided photographic paper described in the patent comprises a paper base, a first photosensitive layer and a first protective layer which are symmetrically disposed on the other side of the paper substrate with a second photosensitive layer and a second protection by a recognized color paper manufacturing technique. Layer, because the two sides are exposed, it is easy to have a negative impact on the photographic performance of the product, such as fog The density increases and the sensitivity decreases. Summary of the invention
  • the technical problem to be solved by the present invention is to overcome the above-mentioned drawbacks of the prior art and provide a double-sided photosensitive color paper having a rich color, a wide color gamut, a rich image layer, high definition efficiency, and low cost.
  • the technical solution drawn by the present invention is:
  • a double-sided photosensitive color photographic paper comprising a support, a photosensitive layer and a protective layer, and a barrier layer and at least one light blocking layer are disposed between one side of the support and the photosensitive layer, wherein the barrier layer is located at the light blocking layer and Between the photosensitive layers; on the other side of the support, a second light blocking layer, a second blocking layer, a second photosensitive layer and a second protective layer symmetrically arranged with the light blocking layer, the barrier layer, the photosensitive layer and the protective layer are disposed .
  • the thickness of the barrier layer is 0. 5 ⁇ 5 ⁇ ⁇ .
  • the material for forming the barrier layer includes an anti-staining agent and gelatin. 5 ⁇ 5 ⁇ ⁇
  • the double-sided photosensitive color paper, the thickness of the light-blocking layer is 0. 5 ⁇ 5 ⁇ ⁇ .
  • the components in the light-blocking layer and the coating amount thereof are:
  • Anti-pollution agent 0. Oi l ⁇ 0. 28 g / m 2 ;
  • the light-blocking substance is one or a combination of colloidal silver, antihalation dye and carbon black.
  • the double-sided photosensitive color photographic paper, the reflection density of the light-blocking layer is 0. 10 - 3. 00.
  • the photosensitive layer is sensitive to three colors of red, green and blue respectively
  • the three layers [3 ⁇ 4 silver and the corresponding coupler are hook coated.
  • the light passes through the emulsion layer and reaches a white paper base.
  • One part of the light passes through the paper base, and the other part of the light is reflected back to the emulsion layer, thereby improving the photosensitivity of the product.
  • the double-sided photosensitive color paper is coated with an emulsion on both sides, when the single-sided exposure is performed, part of the light passing through the paper base causes the emulsion on the other side to be sensitized, which forms an interference image, which has a negative effect on the photographic performance of the product such as an increase in fog density.
  • the sensitivity is lowered, so part of the light that passes through the paper base must be eliminated.
  • the double-sided photosensitive color photographic paper contains a light-blocking layer, which functions to introduce a light-blocking substance to absorb light transmitted through the paper base to prevent photographic imaging of the unexposed emulsion surface.
  • the light-blocking material absorbs light that is transmitted through the paper base while absorbing some of the light that should be reflected back to the emulsion layer, resulting in insufficient exposure and lowering the photographic performance of the product.
  • the thickness of the light-blocking layer of the present invention is 0.5 to 5 ⁇ ⁇ , but is not limited thereto.
  • One or more of titanium dioxide, silicon dioxide, and aluminum powder, the light-blocking material can completely fall off during the development process, and does not affect the whiteness of the product.
  • Colloidal silver is a nanoscale colloidal metallic silver. This colloidal silver is grayish black and absorbs all visible light. It can be removed during bleaching and fixing.
  • the colloidal silver can be firstly reduced with a reducing agent and silver nitrate to form a small silver cluster aggregate as a core, and then the core is further grown to form stable particles by further reduction reaction, and finally settled, washed, and reconstituted to obtain elemental particles.
  • Colloidal silver can also be formed by the reaction of silver nitrate and 13 ⁇ 4 salt! The silver particles are reacted with a reducing agent and a propellant to form an elemental particle colloidal silver.
  • Anti-halation dyes are dyes that prevent light from scattering between layers and layers of the emulsion to improve the resolution and sharpness of the film. Also known as internal antihalation dyes, antihalation dyes may be but not limited to one or the following Several mixtures. For convenience of explanation, in this paper, the corresponding structural formula is replaced by a code, written under each structural formula.
  • Carbon black is a fine powder produced by incomplete combustion of carbonaceous raw materials, and its coloring power and hiding power are extremely strong; as the particle size of carbon black is reduced, the coloring power and hiding power are enhanced, and the ultraviolet shielding effect is enhanced; Carbon black can remove discoloration when it is in contact with water.
  • Anti-pollution agents are a class of weakly reducing compounds that react with the quinone diimine that may be contained in the light-blocking substance to restore them to p-phenylenediamines, thereby losing coupling and avoiding their stratification. Dyeing fog is produced to adjacent emulsion layers.
  • the antifouling agent for the light blocking layer may be one or more of the following, but is not limited thereto.
  • Stabilizers suitable for the present invention are as follows:
  • the light blocking effect of the W-3 W-4 light blocking layer is mainly achieved by the light blocking material.
  • the same amount of light absorption may produce different densities. Therefore, the density of the light blocking material determines the final light absorption of the light blocking layer.
  • the reflection density of the light blocking layer is selected to be 0. 10 - 3. 00.
  • the reflection density referred to herein is the logarithm of the ratio of the amount of incident light to the amount of reflected light, which reflects the magnitude of the light blocking ratio.
  • the light-blocking substance in the light-blocking layer may have residual developed oxidation product quinodiimide ions in the preparation process, and is layered to the adjacent photosensitive layer to couple with the coupler in the photosensitive layer to form an unnecessary color. , causing the fog of the product to rise.
  • the barrier layer is a hydrophilic gelatin layer containing an anti-fouling agent, wherein the anti-fouling agent may be selected from, but not limited to, KB_1, KB_2, One or a mixture of KB-3, KB_4, KB_5, KB-6.
  • the thickness of the barrier layer is also critical to preventing the occurrence of the string.
  • the barrier layer is too thin to prevent residual development of oxidation products or antihalation dyes from entering adjacent photosensitive layers; the barrier layer is too thick, affecting the permeability of the processing liquid, causing the light-blocking material to not completely fall off, affecting the product.
  • the thickness of the barrier layer of the present invention is 0.5 to 5 ⁇ ⁇ , but is not limited thereto.
  • the photosensitive layer of the invention is three layers which are sensitive to red, green and blue light respectively!
  • the silver and the corresponding coupler are uniformly coated.
  • the red, green and blue light-sensitive silver halide emulsions used in the present invention are all prepared by a double-injection emulsification method known in the art, and are known in the art.
  • Sensitization method Chemical sensitization and linguistic sensitization.
  • the Dilith transition metal ions such as Ir 3+ , Rh 3+ , 0s 3+ and the like in the periodic table may be doped to improve the photographic performance of the emulsion.
  • stabilizers, antifoggants and other auxiliaries may be added during the preparation of the emulsion to improve the photographic performance stability of the emulsion.
  • the three-color coupler, anti-fading agent, anti-pollution agent, ultraviolet absorber and organic anti-blocking substance used in the present invention are all well-known compounds in the art, and are dispersed in a gelatin aqueous solution by a technique known in the art. in.
  • the dispersing agent to be used may be sodium triisopropylsulfonate, sodium lauryl sulfate, sodium dodecyl benzoate, sodium diisooctyl succinate or the like.
  • the high boiling point solvent to be used may be one or a mixture of dibutyl phthalate, trimethyl phosphate, tributyl phosphate, tributyl citrate and benzoic acid ester. It is also possible to add a low boiling point solvent such as ethyl acetate or the like.
  • the amount of the dispersing agent and the high boiling point solvent and the low boiling point solvent is the amount of the conventional dispersion formula.
  • the antifouling agent used in the photosensitive layer of the present invention may be selected from, but not limited to, KB-1, KB-2,
  • the coupler, the anti-fading agent, the stabilizer, the ultraviolet absorber, the high boiling point solvent and the like used in the photosensitive layer in the present invention may have the following structures.
  • the protective layer is a hydrophilic gelatin layer, which is mainly to prevent the photosensitive layer from being scratched during cutting, packaging and processing.
  • the present invention can also be applied by selecting a suitable gelatin, replacing a part of gelatin with a high polymer, and adding a matting agent.
  • the present invention may also be added with known surfactants, tackifiers, stabilizers, hardeners and the like.
  • the support of the present invention is a known paper base for color paper, and has no special requirements.
  • the double-sided photosensitive color paper provided by the present invention is prepared by the following method:
  • a light-blocking layer containing a light-blocking substance, photographic gelatin, and an anti-staining agent, a barrier layer containing gelatin and an anti-staining agent, and a red-green-blue three-color photosensitive layer and a protective layer were separately prepared in accordance with a known manufacturing technique of color paper.
  • Example coating method firstly coating the light-blocking layer on one side of the support of the double-sided bottom layer, condensing and drying, and then coating the barrier layer on the sample of the coated light-blocking layer, After condensing and drying, the three-color photosensitive layer and the protective layer are once coated on the swatch coated with the light blocking layer and the barrier layer; after the condensing and drying is completed, the same side of the support on the double-sided bottom layer is also the same.
  • the method comprises the steps of: coating the light blocking layer, the barrier layer, the photosensitive layer and the protective layer, and condensing and drying to obtain a double-sided photosensitive color phase paper sample.
  • the double-sided photosensitive color photographic paper provided by the invention has rich color, wide color gamut, rich image layer, high definition, high efficiency and low cost.
  • Figure 1 is a schematic view showing the structure of a double-sided photosensitive color photographic paper provided by the present invention.
  • the double-sided photosensitive color photographic paper provided by the present invention comprises a support 1 , and a light blocking layer 2 , a barrier layer 3 , a photosensitive layer 4 and a protective layer 5 are sequentially disposed on one side of the support 1 in the support body.
  • the other side of 1 is provided with a second light blocking layer 6, a second barrier layer 7, a second photosensitive layer 8, and a second protection symmetrically arranged with the above-mentioned light blocking layer 2, barrier layer 3, photosensitive layer 4 and protective layer 5.
  • Layer 9
  • the double-sided photosensitive color photographic paper provided by the present invention will be further described below by way of examples, but is not limited thereto.
  • First layer (light barrier layer) coating amount (g/m 2 )
  • Anti-pollution agent KB-2 0.011
  • Second layer (barrier layer)
  • UV absorber UV-1 0.10 UV absorber UV-1 0.10
  • Anti-pollution agent KB-2 0.03,
  • UV absorber UV-1 0.16 UV absorber UV-1 0.16
  • the three-color photosensitive layer 4 and the protective layer 5 are sequentially uniformly coated on the sample coated with the light blocking layer 2 and the barrier layer 3; after the condensation drying is completed, the same as the double-sided underlying paper base of the support 1
  • the second light blocking layer 6, the second barrier layer 7, the second photosensitive layer 8, and the second protective layer 9 are sequentially coated on one side in the same manner, and condensed and dried to obtain the double-sided photosensitive color phase shown in FIG. Paper samples.
  • the dark package is placed in a high temperature and high humidity box (temperature 65 ° C, humidity 80%, stored for 30 minutes, taken out, exposed on a known exposure apparatus, according to the known The RA-4 process was rinsed, and the photographic performance and standards were basically the same. See Appendix 1 for details.
  • First layer (light barrier layer) coating amount (g/m 2 )
  • Second layer (barrier layer)
  • the seventh layer (red layer)
  • UV absorber UV-1 0.10 UV absorber UV-1 0.10
  • Anti-pollution agent KB-2 0.03,
  • UV absorber UV-1 0.16 UV absorber UV-1 0.16
  • the three-color photosensitive layer 4 and the protective layer 5 are sequentially uniformly coated on the sample coated with the light blocking layer 2 and the barrier layer 3; after the condensation drying is completed, the second resistance of the other side of the support 1 is prepared in the same manner.
  • the light layer 6, the second barrier layer 7, the second photosensitive layer 8, and the second protective layer 9, that is, the double-sided photosensitive color phase paper sample shown in Fig. 1 is obtained.
  • the test method is the same as in the first embodiment.
  • the test results are shown in the attached table 1.
  • First layer (light barrier layer) coating amount (g/m 2 )
  • Second layer (barrier layer)
  • UV absorber UV-1 0.10 UV absorber UV-1 0.10
  • the eighth layer (ultraviolet absorber layer),
  • Anti-pollution agent KB-2 0.03,
  • UV absorber UV-1 0.16 UV absorber UV-1 0.16
  • the protective layer 5 is uniformly coated on the swatch coated with the light blocking layer 2 and the barrier layer 3 in sequence; after the condensation drying is completed, the second light blocking layer 6 and the second barrier layer on the other side of the support 1 are prepared in the same manner. 7.
  • the second photosensitive layer 8 and the second protective layer 9, that is, the double-sided photosensitive color photographic paper sample shown in Fig. 1 is obtained.
  • the test method is the same as in the first embodiment.
  • the test results are shown in the attached table 1.
  • First layer (light barrier layer) coating amount (g/m 2 )
  • Anti-halation dye Z-2 0.15
  • Second layer (barrier layer)
  • Anti-pollution agent KB-2 0.065
  • UV absorber UV-1 0.10 UV absorber UV-1 0.10
  • Anti-pollution agent KB-2 0.03,
  • UV absorber UV-1 0.16 UV absorber UV-1 0.16
  • the protective layer 5 is uniformly coated on the swatch coated with the light blocking layer 2 and the barrier layer 3 in sequence; after the condensation drying is completed, the second light blocking layer 6 and the second barrier layer on the other side of the support 1 are prepared in the same manner. 7.
  • the second photosensitive layer 8 and the second protective layer 9, that is, the double-sided photosensitive color photographic paper sample shown in Fig. 1 is obtained.
  • the test method is the same as in the first embodiment.
  • the test results are shown in the attached table 1.
  • First layer (light barrier layer) coating amount (g/m 2 )
  • Second layer (barrier layer)
  • UV absorber UV-1 0.10 UV absorber UV-1 0.10
  • Anti-pollution agent KB-2 0.03,
  • UV absorber UV-1 0.16 UV absorber UV-1 0.16
  • the protective layer 5 is uniformly coated on the swatch coated with the light blocking layer 2 and the barrier layer 3 in sequence; after the condensation drying is completed, the second light blocking layer 6 and the second barrier layer on the other side of the support 1 are prepared in the same manner. 7.
  • the second photosensitive layer 8 and the second protective layer 9, that is, the double-sided photosensitive color paper sample shown in Fig. 1 is obtained.
  • the test method is the same as in the first embodiment, and the test results are shown in the attached table 1.
  • the minimum density is the color density when the exposure is 0.
  • the sensitivity is the reciprocal of the amount of exposure necessary to make the color density higher than the minimum density, and is displayed as a relative value.
  • the sensitivity of the standard is 100;
  • the difference between the logarithm of the required exposure amount and the logarithm of the exposure amount required to make the color density of 0.7, the contrast of the standard is 40;
  • the maximum density is the color density and 00 ⁇
  • the maximum density of the standard sample is less than or equal to the color density of 0. 05, the maximum density of the standard is 2.00.
  • the double-sided photographic paper made by the invention has the same photographic performance and single-sided photographic paper, and is suitable for the double-sided exposure color-developing machine, and can be obtained with the same color as the single-sided photographic paper.

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Description

一种双面感光彩色相纸 技术领域
本发明涉及一种照相材料， 特别涉及一种双面感光彩色相纸。 背景技术
传统的单面感光彩色相纸只能在相纸一面进行曝光， 形成单面影像， 反 面没有影像。 这样只能装在相框或相册里面单面欣赏， 无法扩大相纸作为图 像载体的使用范围。 而且降低了支持体的利用率， 增加了制造成本。 近年来， 数字短版双面印刷异军突起， 年市场容量迅速扩大， 以数字印刷和喷墨打印 为主的数字短版双面印刷， 能够在有限的平面载体上带给消费者双倍的图文 信息， 广泛应用在名片、 个性化台历、 菜单、 拍卖行样册、 宾馆样牌、 请柬 、 工卡、 商业促销宣传单等方面， 给传统的银盐冲印行业带来巨大的损失和严 峻的挑战。 数字短版双面印刷在一定程度上提高了效率， 满足了消费者个性 化的需求， 但仍存在颜色少， 色域窄， 图像无层次， 清晰度差， 且交货周期 长， 成本相对高的问题。
专利号为 ZL 200520023024. 5的实用新型专利公开了一种双面曝光的激 光扩印机及其使用的双面感光纸， 其曝光单元在曝光区的上下两侧设置 1 个 对称安装的激光曝光器， 在电路控制单元输出的扫描信号控制下激光曝光器 对双面相纸两面分别进行曝光成像， 相纸经冲洗单元完成扩印， 从而实现双 面成像。 该专利中描述的双面相纸包括纸基、 第一感光层和第一保护层， 它 釆用公认的彩色相纸制造技术在纸基的另一面对称设置了第二感光层和第二 保护层， 由于釆用两面曝光， 容易对产品的照相性能产生负面影响， 如灰雾 密度上升、 感光度下降。 发明内容
本发明要解决的技术问题是： 克服上述已有技术的缺陷， 提供一种色彩 丰富、 色域宽、 图像层次丰富、 清晰度高效率高以及成本低的双面感光彩色 相纸。
为解决上述技术问题， 本发明釆取的技术方案为：
一种双面感光彩色相纸， 包括支持体、 感光层、 保护层， 在支持体的一 面和感光层之间设有阻隔层和至少一层阻光层， 所述阻隔层位于阻光层和感 光层之间； 在支持体的另一面设有与上述阻光层、 阻隔层、 感光层和保护层 对称布置的第二阻光层、 第二阻隔层、 第二感光层和第二保护层。
上述双面感光彩色相纸， 所述阻隔层的厚度为 0. 5 ~ 5 μ ηι。
上述双面感光彩色相纸， 所述阻隔层的形成材料包括防污染剂和明胶。 上述双面感光彩色相纸， 所述阻光层的厚度为 0. 5 ~ 5 μ ηι。
上述双面感光彩色相纸， 所述阻光层中的组份及其涂布量为：
阻光物质 0. 014 ~ 0. 88g/m2;
防污染剂 0. Oi l ~ 0. 28 g/m2;
明胶 0. 21 - 5. 65 g/m2;
稳定剂 0. 093 - 1. 67 g/m2。
上述双面感光彩色相纸， 所述阻光物质是胶态银、 防光晕染料和碳黑中 的一种或几种组合。
上述双面感光彩色相纸， 所述阻光层的反射密度是 0. 10 - 3. 00。
上述双面感光彩色相纸， 所述感光层由分别对红、 绿、 蓝三种色光感光 的三层 [¾化银和相应的成色剂均勾涂布而成。
传统的单面相纸曝光时，光线经过乳剂层后达到白色的纸基上，其中一部 份光线透过纸基， 另一部分光线又反射回乳剂层， 从而提高了产品的感光性 能。 由于双面感光彩色相纸两面都涂有乳剂， 单面曝光时， 透过纸基的部分 光线引起另一面的乳剂感光， 形成干扰影像， 对产品的照相性能产生的负面 影响如灰雾密度上升、 感光度下降， 因此， 必须消除透过纸基的部分光线。 为解决上述问题， 本发明提供的双面感光彩色相纸中含有阻光层， 其作用是 引入阻光物质以吸收透过纸基的光线， 防止未曝光的乳剂面感光成像。 然而 阻光物质在吸收透过纸基的光线的同时， 也吸收了部分本应该反射回乳剂层 的光线而造成曝光量不足， 降低产品的照相性能。 因此， 需要选择合适的阻 光层厚度和阻光物质的用量， 以便在保证吸收透过纸基的光线并避免另一乳 剂面感光出现干扰影像的同时， 尽可能减少对本应反射回乳剂层的光线的吸 收， 减少对产品照相性能的负面影响。 本发明的阻光层的厚度为 0. 5 ~ 5 μ ηι, 但不限于此。 二氧化钛、 二氧化硅、 铝粉中的一种或几种， 该阻光物质在显影加工过程中 能够完全脱落， 不影响产品的白度。
胶态银是一种纳米级的胶态金属银， 这种胶态银呈灰黑色， 可吸收全部 可见光， 它可以在漂白、 定影时除去。
胶态银可以用还原剂与硝酸银先发生还原反应， 生成小银簇聚集体作为 核， 然后通过进一步的还原反应使核进一步长大形成稳定的颗粒， 最后沉降、 水洗、 复溶得到单质颗粒胶态银； 也可以先用硝酸银和 1¾盐反应生成！ ¾化银 颗粒， 再和还原剂及促显剂反应生成单质颗粒胶态银。 防光晕染料是能阻止光线在乳剂层间和层中散射的染料， 以提高胶片的 解像力和清晰度， 也称内防光晕染料， 防光晕染料可以是但不仅限于以下的 一种或几种的混合物。 为方便说明， 本文中以代号代替相应的结构式， 写于 每一结构式的下面
Figure imgf000006_0001
Z-l H
Figure imgf000006_0002
1-1
HOOC— C— C^CH-CH=CH— CH=CH— ,C— C— COOH
N C= 0
\ /
N
I SO3K
Z-3
Figure imgf000007_0001
Z-4
Figure imgf000007_0002
Z-5 C Na
Figure imgf000007_0003
Z-6
Figure imgf000007_0004
Z-7
碳黑是以含碳原料经不完全燃烧而产生的微细粉末， 它的着色力及遮盖 力极强； 随着碳黑的粒径减小， 其着色力及遮盖力增强， 防紫外效果增强； 碳黑遇水即可除去脱色。
防污染剂是一类有弱还原性的化合物， 它能和阻光物质中可能含有的醌 二亚胺反应， 使其复原为对苯二胺类化合物， 从而失去偶合性， 避免其串层 到相邻的乳剂层产生染色灰雾。 阻光层用的防污染剂可以是以下物质中的- 种或几种， 但不局限于此。
Figure imgf000008_0001
KB— 1 KB-2
Figure imgf000008_0002
KB- 3 KB— 4
Figure imgf000008_0003
KB— 5 KB— 6
适合本发明的稳定剂如下式:
K
Figure imgf000008_0004
HCOCH3
W-l W-2
Figure imgf000009_0001
W-3 W-4 阻光层的阻光作用主要是靠阻光物质实现的， 同样的用量，不同的吸光可 能产生不同的密度， 因此阻光物质产生的密度决定了阻光层最终的吸光效果, 所述阻光层的反射密度选择 0. 10 - 3. 00, 此处所称反射密度是指入射光量与 反射光量比值的对数， 它反映了阻光率的大小。
阻光层中的阻光物质在制备过程中可能有残留的显影氧化产物醌二亚胺 离子， 串层到相邻的感光层， 与感光层中的成色剂发生偶合反应， 形成不必 要的颜色， 造成产品的灰雾上升。 为避免串层现象的发生， 需要在阻光层中 间加一阻隔层， 所述阻隔层是含有防污染剂的亲水明胶层， 其中所述防污染 剂可以选自但不仅限于 KB_1、 KB_2、 KB- 3, KB_4、 KB_5、 KB-6中的一种或几 种混合。
本发明中， 阻隔层的厚度对阻止串层的发生也很关键。 阻隔层太薄， 不足 以阻止残留的显影氧化产物或防光晕染料串入相邻的感光层； 阻隔层太厚， 影响加工药液的渗透性， 造成阻光物质不能完全脱落， 影响产品的白度， 本 发明的阻隔层的厚度为 0. 5 ~ 5 μ ηι, 但不限于此。
本发明所述感光层均由分别对红、绿、蓝三种色光感光的三层！ ¾化银和相 应的成色剂均匀涂布而成， 其中， 本发明中使用的红绿蓝三色感光卤化银乳 剂均釆用本领域公知的双注乳化法制备， 并釆用本领域公知的增感方法进行 化学增感和光语增感。 在乳剂制备的过程中， 可以掺杂元素周期表中第丽族 过渡金属离子如 Ir3+、 Rh3+、 0s3+等， 以改善乳剂的照相性能。 同时， 在乳剂的 制备过程中， 可以加入稳定剂、 防灰雾剂及其它助剂， 以改善乳剂的照相性 能稳定性。
本发明中所釆用的三色成色剂、 防褪色剂， 防污染剂、 紫外吸收剂以及 有机的防粘连物质均为本领域公知的化合物， 并釆用本领域公知的技术方法 分散于明胶水溶液中。 釆用的分散剂可以是三异丙基磺酸钠、 十二烷基硫酸 钠、 十二烷基苯横酸钠及丁二酸二异辛酯磺酸钠等。 釆用的高沸点溶剂可以 是部苯二曱酸二丁酯、 磷酸三曱酚酯、 磷酸三丁酯、 柠檬酸三丁酯及苯曱酸 酯等的一种或几种的混合物。 也可以添加部分如乙酸乙酯等的低沸点溶剂。 分散剂和高沸点溶剂、 低沸点溶剂的用量为常规分散配方用量。
本发明中感光层所釆用的防污染剂可以选自但不仅限于 KB-1、 KB-2、
KB- 3, KB_4、 KB_5、 KB-6中的一种或几种混合。
本发明中感光层所釆用的成色剂、 防褪色剂、 稳定剂、 紫外吸收剂、 高 沸点溶剂等可以是以下结构。
Figure imgf000010_0001
B1
Figure imgf000011_0001
〇
Figure imgf000012_0001
〇 OH2S02〇 I
Figure imgf000013_0001
Fl
Figure imgf000013_0002
F2
高沸点溶剂:
Figure imgf000013_0003
Rl R2
Figure imgf000013_0004
R3 R4 紫外吸收剂：
Figure imgf000013_0005
UV-1 UV-2 保护层是一个亲水的明胶层， 主要是防止感光层在裁切整理包装及加工 过程中被划伤。 为了提高保护层的机械强度及防粘连性能， 本发明还可以釆 用选择合适的明胶、 用高聚物替代部分明胶， 以及加入毛面剂等方法。
为了更好的调整双面相纸产品的表观和性能， 本发明还可以加入公知的 表面活性剂、 增黏剂、 稳定剂、 坚膜剂等。
本发明所述支持体是公知的彩色相纸用纸基， 无特殊要求。
本发明提供的双面感光彩色相纸通过下述方法制备：
首先制备含有阻光物质、 照相明胶和防污染剂的阻光层、 含有明胶及防 污染剂的阻隔层， 在按照彩色相纸公知的制造技术分别制备红绿蓝三色感光 层和保护层。 釆用挤压涂布方式， 先将阻光层均勾涂布在双面底层的支持体 的一侧， 冷凝干燥后再将阻隔层均勾涂布在已涂布阻光层的样片上， 冷凝干 燥后再将三色感光层和保护层一次均勾涂布在已涂有阻光层及阻隔层的样片 上； 冷凝干燥完成后， 同样在双面底层的支持体的另一侧按照相同的方法依 次均勾涂布阻光层、 阻隔层、 感光层和保护层， 冷凝干燥后得到双面感光彩 色相纸样片。
与现有技术相比， 本发明提供的双面感光彩色相纸色彩丰富、 色域宽、 图像层次丰富、 清晰度高、 效率高以及成本低。 附图说明
图 1是本发明提供的双面感光彩色相纸的结构示意图。
图中各标号为： 支持体 1、 阻光层 2 , 阻隔层 3, 感光层 4、 保护层 5 , 第 二阻光层 6 , 第二阻隔层 7 , 第二感光层 8 , 第二保护层 9。 具体实施方式
请参阅图 1, 本发明提供的双面感光彩色相纸包括支持体 1, 并且在支持 体 1的一面依次设有阻光层 2、 阻隔层 3、 感光层 4和保护层 5, 在支持体 1 的另一面依次设有与上述阻光层 2、 阻隔层 3、 感光层 4和保护层 5对称布置 的第二阻光层 6、 第二阻隔层 7、 第二感光层 8和第二保护层 9。
下面通过实施例对本发明提供的双面感光彩色相纸作进一步说明， 但不 限于此。
实施例 1
第一层（阻光层） 涂布量（ g/m2 )
胶态银 0.014,
明胶 0.21,
防污染剂 KB-2 0.011,
稳定剂 W-1 0.093,
溶剂 R-1 0.0067,
溶剂 R-3 0.0033,
第二层（阻隔层）
明胶 0.0773,
防污染剂 KB-2 0.0054,
溶剂 R-1 0.0034,
溶剂 R-3 0.0017,
第三层（感蓝层）
感蓝乳剂 4艮 0.25,
明胶 1.20, 黄色成色剂 Dl 10.43, 影像光稳定剂 Fl 0.10, 溶剂 R-1 0.30, 溶剂 R-2 0.20, 第四层（隔层）
明胶 0.85, 防污染剂 KB-2 0.09, 溶剂 R-1 0.06, 溶剂 R- 3 0.03, 第五层（感绿层）
感绿乳剂银 0.10, 明胶 1.00, 品色成色剂 E1 0.25, 影像光稳定剂 F1 0.20, 溶剂 R-1 0.10, 溶剂 R-4 0.05, 第六层（紫外吸收层）
明胶 0.80, 防污染剂 KB-2 0.10, 紫外吸收剂 UV-1 0.20, 紫外吸收剂 UV-2 0.08, 溶剂 R-1 0.15, 溶剂 R-3 0.03, 溶剂 R-4 0.12, 第七层（感红层）
感红乳剂银 0.17,
明胶 0.90,
青色成色剂 B1 0.37,
紫外吸收剂 UV-1 0.10,
溶剂 R-1 0.25,
溶剂 R-3 0.10,
第八层（紫外吸收剂层）
明胶 0.55,
防污染剂 KB-2 0.03,
紫外吸收剂 UV-1 0.16,
紫外吸收剂 UV-2 0.04,
溶剂 R-1 0.09,
溶剂 R-3 0.02,
溶剂 R-4 0.05,
第九层 (保护层）
明胶 0.80,
表面活性剂 J-1 0.22,
坚膜剂 H- 1 0.12,
调整涂布量， 釆用挤压涂布方式， 先将阻光层 2 均勾涂布在双面底层纸 即， 支持体 1) 的一侧， 冷凝干燥后釆用差减法测试阻光层 2 的厚度为 ηι, 测试其密度为 0.103; 再将阻隔层 3均勾涂布在已涂布阻光层 1的样 片上， 冷凝干燥后釆用差减法测试阻隔层 3的厚度为 0.5μηι。 再将三色感光 层 4和保护层 5依次均匀涂布在已涂有阻光层 2及阻隔层 3的样片上； 冷凝 干燥完成后， 同样在作为支持体 1 的双面底层纸基的另一侧按照相同的方法 依次均勾涂布第二阻光层 6、 第二阻隔层 7、 第二感光层 8和第二保护层 9, 冷凝干燥后得到图 1所示的双面感光彩色相纸样片。
将得到的样片按标准裁切成一定量的试条后，暗包装放入高温高湿箱（温 度 65°C, 湿度 80%中存放 30分钟后取出， 在公知的曝光设备上曝光， 按照公 知的 RA-4加工工艺冲洗， 测试其照相性能和标样基本一致。 具体见附表 1。
实施例 2
第一层（阻光层） 涂布量 ( g/m2 )
胶态银 0.11,
明胶 1.45,
防污染剂 KB-4 0.08,
稳定剂 W-2 0.62,
溶剂 R-1 0.045,
溶剂 R-3 0.022,
第二层（阻隔层）
明胶 0.515,
防污染剂 KB-4 0.036,
溶剂 R-1 0.023,
溶剂 R-3 0.012,
第三层（感蓝层）
感蓝乳剂 4艮 0.25, 明胶 1.20, 黄色成色剂 D2 10.43, 影像光稳定剂 F1 0.10, 溶剂 R-1 0.30, 溶剂 R- 2 0.20, 第四层（隔层），
明胶 0.85, 防污染剂 KB-2 0.09, 溶剂 R-1 0.06, 溶剂 R-3 0.03, 第五层（感绿层）
感绿乳剂银 0.10, 明胶 1.00, 品色成色剂 E2 0.25, 影像光稳定剂 F1 0.20, 溶剂 R-1 0.10, 溶剂 R-4 0.05, 第六层（紫外吸收层）
明胶 0.80, 防污染剂 KB-2 0.10, 紫外吸收剂 UV-1 0.20, 紫外吸收剂 UV-2 0.08, 溶剂 R-1 0.15, 溶剂 R-3 0.03, 溶剂 R-4 0.12,
第七层（感红层）
感红乳剂银 0.17,
明胶 0.90,
青色成色剂 B2 0.37,
紫外吸收剂 UV-1 0.10,
溶剂 R-1 0.25,
溶剂 R-3 0.10,
第八层（紫外吸收剂层）
明胶 0.55,
防污染剂 KB-2 0.03,
紫外吸收剂 UV-1 0.16,
紫外吸收剂 UV-2 0.04,
溶剂 R-1 0.09,
溶剂 R-3 0.02,
溶剂 R-4 0.05,
第九层 (保护层）
明胶 0.80,
表面活性剂 J-1 0.22,
坚膜剂 H- 1 0.15,
调整涂布量， 釆用挤压涂布方式， 先将阻光层 2 均勾涂布在双面底层纸 即， 支持体 1 ) 的一侧， 冷凝干燥后釆用差减法测试阻光层 2的厚度为 2 μηι,测试其密度为 1.10;再将阻隔层 3均勾涂布在已涂布阻光层 2的样片上， 冷凝干燥后釆用差减法测试阻隔层 3的厚度为 2 μηι。 再将三色感光层 4和保 护层 5依次均匀涂布在已涂有阻光层 2及阻隔层 3的样片上； 冷凝干燥完成 后， 以同样方法制备支持体 1另一侧的第二阻光层 6、 第二阻隔层 7、 第二感 光层 8和第二保护层 9, 即得到图 1所示的双面感光彩色相纸样片。
测试方法同实施例 1, 测试结果见附表 1。
实施例 3
第一层（阻光层） 涂布量 ( g/m2 )
炭黑 0.43,
明胶 2.17,
防污染剂 ΚΒ-4 0.11,
稳定剂 W-2 0.93,
溶剂 R-1 0.067,
溶剂 R-3 0.033,
第二层（阻隔层）
明胶 0.773,
防污染剂 ΚΒ-4 0.054,
溶剂 R-1 0.034,
溶剂 R-3 0.017,
第三层（感蓝层）
感蓝乳剂 4艮 0.25,
明胶 1.20,
黄色成色剂 D2 10.43, 影像光稳定剂 Fl 0.10, 溶剂 R-l 0.30, 溶剂 R-2 0.20, 第四层（隔层）
明胶 0.85, 防污染剂 KB-2 0.09, 溶剂 R-1 0.06, 溶剂 R-3 0.03, 第五层（感绿层）
感绿乳剂银 0.10, 明胶 1.00, 品色成色剂 E2 0.25, 影像光稳定剂 F1 0.20, 溶剂 R-1 0.10, 溶剂 R-4 0.05, 第六层（紫外吸收层）
明胶 0.80, 防污染剂 KB- 2 0.10, 紫外吸收剂 UV-1 0.20, 紫外吸收剂 UV-2 0.08, 溶剂 R-1 0.15, 溶剂 R-3 0.03, 溶剂 R-4 0.12, 第七层（感红层）
感红乳剂银 0.17,
明胶 0.90,
青色成色剂 B2 0.37,
紫外吸收剂 UV-1 0.10,
溶剂 R-1 0.25,
溶剂 R-3 0.10,
第八层（紫外吸收剂层），
明胶 0.55,
防污染剂 KB-2 0.03,
紫外吸收剂 UV-1 0.16,
紫外吸收剂 UV-2 0.04,
溶剂 R-1 0.09,
溶剂 R-3 0.02,
溶剂 R-4 0.05,
第九层 (保护层）
明胶 0.80,
表面活性剂 J-1 0.22,
坚膜剂 H- 1 0.17,
调整涂布量， 釆用挤压涂布方式， 先将阻光层 2 均勾涂布在双面底层纸 基 (即， 支持体 1 ) 的一侧， 冷凝干燥后釆用差减法测试阻光层 2的厚度为 3 μηι,测试其密度为 1.60;再将阻隔层 3均勾涂布在已涂布阻光层 2的样片上， 冷凝干燥后釆用差减法测试阻隔层 3的厚度为 3μηι。 再将三色感光层 4和保 护层 5依次均匀涂布在已涂有阻光层 2及阻隔层 3的样片上； 冷凝干燥完成 后， 以同样方法制备支持体 1另一侧的第二阻光层 6、 第二阻隔层 7、 第二感 光层 8和第二保护层 9, 即得到图 1所示的双面感光彩色相纸样片。
测试方法同实施例 1, 测试结果见附表 1。
实施例 4
第一层（阻光层） 涂布量（g/m2)
黄防光晕染料 Z-1 0.30,
品防光晕染料 Z-2 0.15,
青防光晕染料 Z-3 0.18,
明胶 4.52,
防污染剂 KB-2 0.20,
稳定剂 1.17,
溶剂 R- 1 0.128,
溶剂 R- 3 0.059,
第二层（阻隔层）
明胶 0.90,
防污染剂 KB-2 0.065,
溶剂 R- 1 0.041,
溶剂 R- 3 0.024,
第三层（感蓝层）
感蓝乳剂银 0.25,
明胶 1.20,
黄色成色剂 D 10.43, 影像光稳定剂 Fl 0.10, 溶剂 R-l 0.30, 溶剂 R-2 0.20, 第四层（隔层）
明胶 0.85, 防污染剂 KB-2 0.09, 溶剂 R-1 0.06, 溶剂 R-3 0.03, 第五层（感绿层）
感绿乳剂银 0.10, 明胶 1.00, 品色成色剂 E1 0.25, 影像光稳定剂 F1 0.20, 溶剂 R-1 0.10, 溶剂 R-4 0.05, 第六层（紫外吸收层）
明胶 0.80, 防污染剂 KB-2 0.10, 紫外吸收剂 UV-1 0.20, 紫外吸收剂 UV-2 0.08, 溶剂 R-1 0.15, 溶剂 R-3 0.03, 溶剂 R-4 0.12, 第七层（感红层）
感红乳剂银 0.17,
明胶 0.90,
青色成色剂 B1 0.37,
紫外吸收剂 UV-1 0.10,
溶剂 R-1 0.25,
溶剂 R-3 0.10,
第八层（紫外吸收剂层）
明胶 0.55,
防污染剂 KB-2 0.03,
紫外吸收剂 UV-1 0.16,
紫外吸收剂 UV-2 0.04,
溶剂 R-1 0.09,
溶剂 R-3 0.02,
溶剂 R-4 0.05,
第九层 (保护层）
明胶 0.80,
表面活性剂 J-1 0.22,
坚膜剂 H- 1 0.19,
调整涂布量， 釆用挤压涂布方式， 先将阻光层 2 均勾涂布在双面底层纸 基 (即， 支持体 1 ) 的一侧， 冷凝干燥后釆用差减法测试阻光层 2的厚度为 4 μηι,测试其密度为 2.11;再将阻隔层 3均勾涂布在已涂布阻光层 2的样片上， 冷凝干燥后釆用差减法测试阻隔层 3的厚度为 4 μηι。 再将三色感光层 4和保 护层 5依次均匀涂布在已涂有阻光层 2及阻隔层 3的样片上； 冷凝干燥完成 后， 以同样方法制备支持体 1另一侧的第二阻光层 6、 第二阻隔层 7、 第二感 光层 8和第二保护层 9, 即得到图 1所示的双面感光彩色相纸样片。
测试方法同实施例 1, 测试结果见附表 1。
实施例 5
第一层（阻光层） 涂布量（ g/m2 )
黄防光晕染料 Z-1 0.42,
品防光晕染料 Z-5 0.21,
青防光晕染料 Z-4 0.25,
明胶 5.65,
防污染剂 KB-2 0.28,
稳定剂 1.67,
溶剂 R-1 0.181,
溶剂 R-3 0.084,
第二层（阻隔层）
明胶 1.28,
防污染剂 KB-2 0.092,
溶剂 R-1 0.058,
溶剂 R-3 0.034,
第三层（感蓝层）
感蓝乳剂银 0.25,
明胶 1.20,
黄色成色剂 D 10.43, 影像光稳定剂 1 0.10, 溶剂 R-1 0.30, 溶剂 R-2 0.20, 第四层（隔层）
明胶 0.85, 防污染剂 KB-2 0.09, 溶剂 R-1 0.06, 溶剂 R-3 0.03, 第五层（感绿层）
感绿乳剂银 0.10, 明胶 1.00, 品色成色剂 E1 0.25, 影像光稳定剂 F1 0.20, 溶剂 R-1 0.10, 溶剂 R- 4 0.05, 第六层（紫外吸收层）
明胶 0.80, 防污染剂 KB-2 0.10, 紫外吸收剂 UV-1 0.20, 紫外吸收剂 UV-2 0.08, 溶剂 R-1 0.15, 溶剂 R-3 0.03, 溶剂 R- 4 0.12, 第七层（感红层）
感红乳剂银 0.17,
明胶 0.90,
青色成色剂 B1 0.37,
紫外吸收剂 UV-1 0.10,
溶剂 R-1 0.25,
溶剂 R-3 0.10,
第八层（紫外吸收剂层）
明胶 0.55,
防污染剂 KB-2 0.03,
紫外吸收剂 UV-1 0.16,
紫外吸收剂 UV-2 0.04,
溶剂 R-1 0.09,
溶剂 R-3 0.02,
溶剂 R-4 0.05,
第九层 (保护层）
明胶 0.80,
表面活性剂 J-1 0.22,
坚膜剂 H- 1 0.22,
调整涂布量， 釆用挤压涂布方式， 先将阻光层 2 均勾涂布在双面底层纸 基 (即， 支持体 1 ) 的一侧， 冷凝干燥后釆用差减法测试阻光层 2的厚度为 5 μηι,测试其密度为 3.01;再将阻隔层 3均勾涂布在已涂布阻光层 2的样片上， 冷凝干燥后釆用差减法测试阻隔层 3的厚度为 5 μηι。 再将三色感光层 4和保 护层 5依次均匀涂布在已涂有阻光层 2及阻隔层 3的样片上； 冷凝干燥完成 后， 以同样方法制备支持体 1另一侧的第二阻光层 6、 第二阻隔层 7、 第二感 光层 8和第二保护层 9 , 即得到图 1所示的双面感光彩色相纸样片。
测试方法同实施例 1 , 测试结果见附表 1。 附表 1 照相性能
Figure imgf000030_0001
感蓝层 0. 10 37 96 1. 96 实施例 5 感绿层 0. 10 37 98 1. 97 感红层 0. 10 37 97 1. 98 附表 1中:
最小密度为曝光量为 0 时的彩色密度， 感光度为使彩色密度比最小密度 高 0. 6所必须曝光量的倒数， 并显示为一个相对值， 取标样的感光度为 100; 反差为使彩色密度为 0. 7所需曝光量的对数和使彩色密度为 1. 7所需曝光量 的对数之间的差值， 取标样的反差为 40; 最大密度为彩色密度与此时所需曝 光量对数的微分值小于或等于 0. 05时的彩色密度,取标样的最大密度为 2. 00。
由表 1 中的数据可以看出， 釆用本发明制造的双面感光相纸， 照相性能 和单面相纸基本一致， 适应双面曝光彩扩机， 可以得到和单面相纸一样的色 彩丰富、 色域宽、 图像层次丰富以及清晰度高的双面影像。 而且效率高、 成 本低、 有利于环保， 节约纸浆资源， 实用性强， 同时便于观赏和装订使用。

Claims

权 利 要 求 书
1.一种双面感光彩色相纸， 包括支持体、 感光层、 保护层， 其特征在于： 在支持体的一面和感光层之间设有阻隔层和至少一层阻光层， 所述阻隔层位于 阻光层和感光层之间； 在支持体的另一面设有与上述阻光层、 阻隔层、 感光层 和保护层对称布置的第二阻光层、 第二阻隔层、 第二感光层和第二保护层。
2. 根据权利要求 1所述双面感光彩色相纸， 其特征在于： 所述各阻隔层的 厚度为 0.5~5μηι。
3.根据权利要求 2所述双面感光彩色相纸， 其特征在于： 所述各阻隔层的 形成材料包括防污染剂和明胶。
4. 根据权利要求 3所述双面感光彩色相纸， 其特征在于： 所述各阻光层的 厚度为 0.5~5μηι。
5.根据权利要求 1、 1、 3或 4所述双面感光彩色相纸， 其特征在于： 所述 各阻光层中的制备组份及其涂布量为：
阻光物质 0.014 ~ 0.88g/m2;
防污染剂 0. Oil ~ 0.28 g/m2;
明胶 0.21 -5.65 g/m2;
稳定剂 0.093 - 1.67 g/m2。
6. 根据权利要求 5所述双面感光彩色相纸， 其特征在于： 所述各阻光物质 是胶态银、 防光晕染料、 碳黑、 二氧化钛、 二氧化硅、 铝粉中的一种或几种组 合。
7.根据权利要求 6所述双面感光彩色相纸， 其特征在于： 所述各阻光层的 反射密度是 0. 10 - 3. 000
8.根据权利要求 7所述双面感光彩色相纸， 其特征在于， 所述各感光层由 分别对红、 绿、 蓝三种色光感光的三层 [¾化4艮和相应的成色剂均勾涂布而成。
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