EP0298310B1 - Mattiertes photografisches Aufzeichnungsmaterial - Google Patents

Mattiertes photografisches Aufzeichnungsmaterial Download PDF

Info

Publication number
EP0298310B1
EP0298310B1 EP19880110000 EP88110000A EP0298310B1 EP 0298310 B1 EP0298310 B1 EP 0298310B1 EP 19880110000 EP19880110000 EP 19880110000 EP 88110000 A EP88110000 A EP 88110000A EP 0298310 B1 EP0298310 B1 EP 0298310B1
Authority
EP
European Patent Office
Prior art keywords
particles
recording material
matting agent
photographic recording
matting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19880110000
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298310A1 (de
Inventor
Hermann Dr. Noth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0298310A1 publication Critical patent/EP0298310A1/de
Application granted granted Critical
Publication of EP0298310B1 publication Critical patent/EP0298310B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/95—Photosensitive materials characterised by the base or auxiliary layers rendered opaque or writable, e.g. with inert particulate additives

Definitions

  • the invention relates to a photographic recording material which has at least one photosensitive layer on at least one side of the support and is matted on at least one photosensitive side.
  • the most important matting measure in practice is the addition of finely divided solid substances to the coating solution for the outermost layer of the recording material.
  • the matted in this way can Materials after exposure and development have a defect known as a "starry night” or "pinhole” effect and e.g. B. is described in more detail in US 4,172,731. This error can cause fine details of the recording, e.g. B. halftone dots or lines of a line mask can be falsified or destroyed. Such a material is not suitable for use, for example, in reproduction technology.
  • the cited US patent proposes to use, as matting agents, polymer particles which, due to incorporated pigments, match their color and light absorption to the color of the image in the processed recording material. This avoids the "starry night" effect.
  • the particles of the matting agent still present on the clear areas of the processed recording material cause light absorption, which appears as a fog density. Therefore, the amount of the matting agent can not be determined according to the desired physical properties, but is limited by the intended use of the recording material.
  • US Pat. No. 4,094,848 discloses finely divided porous particles made from a copolymer containing carboxyl groups, which are suitable as matting agents for photographic recording materials. They are prepared by dispersing the copolymer dissolved in a hydrophobic solvent in an aqueous medium in the presence of a wetting agent and have e.g. with a particle size of 2 to 5 ⁇ m pores of 0.5 to 3 ⁇ m size.
  • a wetting agent e.g. with a particle size of 2 to 5 ⁇ m pores of 0.5 to 3 ⁇ m size.
  • such particles have insufficient mechanical stability and can be destroyed when the recording material is stressed, as a result of which the matting effect is lost.
  • the object of the invention is to provide a matted photographic material which does not have a "starry night” effect and in which any desired degree of matting can be set without impairing the photographic properties and in which the matting effect is not caused by mechanical stress is reduced.
  • a matt photographic material consisting of at least one light-sensitive layer and optionally one or more auxiliary layers on at least one side of a support which contains in at least one of these layers a matting agent in the form of fine porous particles of a solid, the average diameter of which is between 1 and 30 ⁇ m and contains no pigment, has practically no "starry night" error without the photographic properties, in particular the fog, being impaired if the average diameter of the pores is at least 20 nm and the ratio of the average particle diameter to the average pore diameter is not less than 10.
  • the matted photographic recording material according to the invention usually contains the matting agents as a component of the outer coating or protective layer. At least one light-sensitive recording layer is located between this layer and the film support; however, several light-sensitive layers and auxiliary layers can also be arranged there be. However, it is also possible to add the matting agent to the casting solutions for the light-sensitive layers.
  • the average diameter of the particles of the matting agent is between 1 and 30 ⁇ m and is appropriately determined in individual cases, depending on the total thickness of the layers applied to the matted side and on the desired degree of matting.
  • the range from 5 to 10 ⁇ m is preferred.
  • a narrow particle size distribution of the matting agent particles is particularly advantageous.
  • the average diameter of the pores in the particles of the matting agent according to the invention is at least 20 nm. Its upper limit is given by the fact that the matting agent particles lose stability if the pores are too large in relation to the particles. Therefore, the ratio of the average particle diameter to the average pore diameter should not be less than 10. A preferred range of the average pore diameter is between 100 and 400 nm.
  • the matting agent particles of the matted recording materials according to the invention can consist of any solids which are insoluble in the solvent used in the preparation of the materials and have no undesirable effects on the photographic properties of the materials.
  • These can be, for example, inorganic solids such as silicon dioxide, oxides of titanium and aluminum, carbonates of zinc and calcium, sulfates of barium and calcium, and silicates of calcium and aluminum.
  • organic solids, especially natural and synthetic polymers, e.g. B. cellulose esters, polymethyl methacrylate, polystyrene or polydivinylbenzene and copolymers are suitable. Silicon dioxide and polydivinylbenzene are preferred.
  • porous, finely divided solids contained in the photographic recording materials according to the invention as matting agents can be prepared by known processes.
  • DE 26 41 548 is mentioned here only as an example.
  • Such finely divided solids are commercially available, for example, for use as a stationary phase in chromatographic separations.
  • the invention can be applied to all photographic recording materials in which photosensitive layers are applied to supports.
  • These light-sensitive layers can contain, for example, silver halides as the light-sensitive substance.
  • they can be produced by known processes, which are compiled by way of example in Research Disclosure 176043 (December 1978). These can be single or multilayer materials for black and white recordings as well as color image materials.
  • the scope the invention is, however, not exhausted with the silver halide-containing recording materials, but extends e.g. B. also on matt diazo copying films and materials with photochromic substances.
  • see-through materials these are preferably polyethylene terephthalate films, and see-through materials are preferably produced on polyethylene-coated papers.
  • the process according to the invention is preferably used in the production of photographic recording materials, e.g. B. for reproduction technology, for medical diagnostics, for material testing with X-rays, for the registration of the output of data processing systems and for microfilm documentation.
  • photographic recording materials e.g. B. for reproduction technology
  • medical diagnostics for material testing with X-rays
  • microfilm documentation for the registration of the output of data processing systems and for microfilm documentation.
  • the content of matting agent in the coating solution was determined in such a way that the matting effect, judged by the suction time, was approximately the same for all pores.
  • the coating solutions contained conventional coating aids.
  • the exposure required for the recording material to be tested is determined by copying an original, which contains different tonal value levels of a grid with 60 L / cm, with different exposure times onto the emulsion side of the recording material.
  • the required exposure time is the one at which the tonal values 80%, 39% and 7% are reproduced with 20 ⁇ 1%, 61 ⁇ 2% and 93 ⁇ 1%.
  • a necessary exposure for the copying through the antihalation layer on the back of the recording material is determined accordingly.
  • test specimens to be compared are processed under the same conditions appropriate for the emulsion type.
  • the copy film is always developed mechanically in a lith developer.
  • sample C according to the invention has both a low fog (Dmin) and a low "starry night” effect (high Dmax).
  • comparative samples A and B show too high a "starry night” error (low Dmax) and comparative samples D and E show an inadmissibly high haze (Dmin) with good Dmax.
  • the content of both matting agents in the coating solution for the protective layer was 0.0063% by weight.
  • Table 3 sample Dmin Dk Dmax Suction time A 0.030 0.10 4.3 19 s B 0.030 0.06 5.0 19 s
  • sample B shows a significantly lower "starry night” effect than the comparison sample A.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Laminated Bodies (AREA)
EP19880110000 1987-06-30 1988-06-23 Mattiertes photografisches Aufzeichnungsmaterial Expired - Lifetime EP0298310B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873721481 DE3721481A1 (de) 1987-06-30 1987-06-30 Mattiertes photographisches aufzeichnungsmaterial
DE3721481 1987-06-30

Publications (2)

Publication Number Publication Date
EP0298310A1 EP0298310A1 (de) 1989-01-11
EP0298310B1 true EP0298310B1 (de) 1992-09-02

Family

ID=6330544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880110000 Expired - Lifetime EP0298310B1 (de) 1987-06-30 1988-06-23 Mattiertes photografisches Aufzeichnungsmaterial

Country Status (4)

Country Link
EP (1) EP0298310B1 (enrdf_load_html_response)
JP (1) JPS6431149A (enrdf_load_html_response)
DE (1) DE3721481A1 (enrdf_load_html_response)
ES (1) ES2035167T3 (enrdf_load_html_response)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122445A (en) * 1989-06-20 1992-06-16 Fuji Photo Film Co., Ltd. Silver halide photographic materials
DE4244065A1 (de) * 1992-12-24 1994-06-30 Du Pont Deutschland Verfahren zur Herstellung eines mattierten lichtempfindlichen Silberhalogenid-Aufzeichnungsmaterials
SE528389C2 (sv) * 2005-03-11 2006-10-31 Atlas Copco Rock Drills Ab Vridanordning för en bom till en gruv- eller entreprenadrigg jämte rigg

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE588116A (enrdf_load_html_response) * 1959-03-03 1900-01-01
JPS51135958A (en) * 1975-05-20 1976-11-25 Fuji Photo Film Co Ltd Method of making fine powder polymer having pores
US4070286A (en) * 1976-06-15 1978-01-24 E. I. Du Pont De Nemours And Company Macroporous microspheroids and a process for their manufacture
US4172731A (en) * 1978-04-03 1979-10-30 Eastman Kodak Company Photographic element containing a light absorbing matting agent
JPS62163047A (ja) * 1986-01-13 1987-07-18 Mitsubishi Paper Mills Ltd ハロゲン化銀写真感光材料

Also Published As

Publication number Publication date
DE3721481A1 (de) 1989-01-12
EP0298310A1 (de) 1989-01-11
DE3721481C2 (enrdf_load_html_response) 1990-10-18
JPS6431149A (en) 1989-02-01
ES2035167T3 (es) 1993-04-16

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