EP0408882A1 - Verfahren zur Herstellung von farbfotografischen Kopien - Google Patents

Verfahren zur Herstellung von farbfotografischen Kopien Download PDF

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Publication number
EP0408882A1
EP0408882A1 EP90110762A EP90110762A EP0408882A1 EP 0408882 A1 EP0408882 A1 EP 0408882A1 EP 90110762 A EP90110762 A EP 90110762A EP 90110762 A EP90110762 A EP 90110762A EP 0408882 A1 EP0408882 A1 EP 0408882A1
Authority
EP
European Patent Office
Prior art keywords
exposure
color
mol
silver halide
development
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.)
Withdrawn
Application number
EP90110762A
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German (de)
English (en)
French (fr)
Inventor
Ubbo Dr. Wernicke
Herbert Mitzinger
Udo Dr. Quilitzsch
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of EP0408882A1 publication Critical patent/EP0408882A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/50—Reversal development; Contact processes

Definitions

  • the invention relates to a process for the production of colored copies of halftone originals using a color paper with extremely hard gradation and a process for the production of colored copies based on optionally positive colored line and halftone originals using a single type of color paper.
  • overexposed contrastless slide originals require a hard gradation of the copy material
  • high-contrast underexposed slide originals require a soft gradation of the copy material
  • the picture-to-picture copy requires hard-working copy material, because otherwise unacceptable flat copies would otherwise be produced on the usual color reversal paper
  • Color reversal paper with hard gradation should have gamma values that are approx. 20% higher than with color reversal paper with normal gradation.
  • an extremely hard gradation color paper according to the invention has a G2 of ⁇ 150.
  • the object of the invention was to modify the processing method so that color copies of acceptable quality of halftone originals can be produced even using color paper with a very hard gradation, and that of contrastless and high-contrast originals, in particular slide originals, in a single machine using a single color paper, color copies of acceptable levels Quality can be produced.
  • the color paper used with very hard gradation contains silver halide emulsions which consist essentially of silver chloride, and that surprisingly the gradation values (gamma 2) can be reduced by approximately 25% without that the maximum densities are drastically reduced (only by about 10%) by means of a filtered homogeneous exposure in addition to the imagewise exposure.
  • the homogeneous exposure can be done either before, during or after the subject exposure, but must be done before the first development.
  • the homogeneous exposure is carried out with an amount of light which ranges from the subliminal pre-exposure to an exposure which reduces the maximum color densities by 0.4 density units.
  • the amount of light required for the exposure device and the type of extremely hard-working color paper used can easily be determined by simple preliminary tests. It is then preferably set automatically by the processing device which previously measures the contrast of the original. This also solves the second task, since the processing device does not carry out the homogeneous pre-exposure with low-contrast originals.
  • Preexposure appears to be favorable immediately before the paper enters the developing machine, whereby the light source should be adjustable in color and brightness.
  • the homogeneous distribution across the paper width can be achieved by means of a light slot, glass fibers, light-conducting plastics or electrical bulbs with reflectors. Preferably three pears with individual blue, green and red filtering and a brightness individually controlled by the electrical resistance are used. Even the homogeneous exposure take place simultaneously with the main exposure, with the additional advantage that the light quantity of the main exposure is reduced by the light quantity of the homogeneous pre-exposure in the case of integral light measurement.
  • the process following the exposure is divided into the following steps: - First development (black-and-white negative development)
  • the silver halide which is exposed imagewise during the exposure, is developed by a first developer into a black-and-white negative.
  • Metol-hydroquinone or phenidone-hydroquinone developers are generally used.
  • Intermediate washing Remove the first developer to avoid post-development in the color development bath.
  • Diffuse second exposure or chemical fogging Everything silver halide not developed in the first developer is made developable.
  • the dyes are proportionally proportional to the silver halide reduced in the color developer Quantity formed from color coupler and the developing developer oxidation product. - Bleaching and fixing or bleach-fixing, removing all of the silver formed in the initial and color development, so that a positive dye image remains.
  • Intermediate watering can be restricted or avoided entirely if the initial development is carried out and ensured by a color developer, e.g. by adding sulfite, ascorbic acid, citrazinic acid or a white coupler that no dye is formed.
  • the color developer substances suitable for the process according to the invention correspond to the general formula (I) wherein R1, R2 optionally substituted C1-C4-alkyl, C6-C10-aryl and C1-C3-alkoxy, R3 H, optionally substituted C1-C4-alkyl, C6-C10-aryl and C1-C3-alkoxy, halogen, n is 1 or 2.
  • N, N-diethyl-p-phenylenediamine hydrochloride 4-N, N-diethyl-2-methylphenylenediamine hydrochloride, 4- (N-ethyl-N-2-methanesulfonylaminoethyl) -2-methylphenylenediamine sesquisulfate monohydrate, 4- (N-ethyl-N-2-hydroxyethyl) -2-methylphenylenediamine sulfate and 4-N, N-diethyl-2,2'-methanesulfonylamino-ethylphenylenediamine hydrochloride.
  • the silver halide emulsions of preferred material for the process according to the invention contain at least 80 mol%. AgCl, in particular at least 95 mol% AgCl, 0 to 20 mol% Agßr, in particular 0 to 5 mol% AgBr and 0 to 2 mol% AgI.
  • the emulsions are preferably iodide-free.
  • It can be predominantly compact crystals, which can have regular cubic or octahedral or transitional forms, for example.
  • platelet-shaped crystals may preferably also be present, the average ratio of diameter to thickness of which is preferably at least 5: 1, the diameter of a grain being defined as the diameter of one Circle with a circle content corresponding to the projected area of the grain.
  • the layers can also have tabular silver halide crystals in which the ratio of diameter to thickness is substantially greater than 5: 1, for example 12: 1 to 30: 1.
  • the silver halide grains can also have a multi-layered grain structure, in the simplest case with an inner and an outer grain area (core / shell), the halide composition and / or other modifications, such as e.g. Doping of the individual grain areas are different.
  • the average grain size of the emulsions is preferably between 0.2 ⁇ m and 2.0 ⁇ m, the grain size distribution can be both homo- and heterodisperse. Homodisperse grain size distribution means that 95% of the grains do not deviate from the mean grain size by more than ⁇ 30%.
  • the material to be processed according to the invention has at least one blue-sensitive silver halide emulsion layer to which at least one yellow coupler is assigned, at least one red-sensitive layer to which at least one cyan coupler is assigned and at least one green-sensitive layer to which at least one purple coupler is assigned.
  • the layer arrangements are suitable carrier, blue-sensitive layer (s), green-sensitive layer (s), red-sensitive layer (s) and support, red-sensitive layer (s), green-sensitive layer (s), blue-sensitive layer (s), in the second case, if necessary, a yellow filter layer is arranged between the blue and green-sensitive layers.
  • the material also contains the usual intermediate and protective layers.
  • a color photographic recording material with the following layer structure was used, the amounts relating to 1 m2 each.
  • the corresponding amounts of AgNO 3 are given.
  • the carrier was polyethylene-coated paper on both sides.
  • the material is exposed imagewise using a grayscale wedge and processed as follows: Initial development 60 sec 36 ° C Watering 120 sec 22 ° C Diffuse second exposure 10 sec Second development 60 sec 36 ° C Watering 30 sec 22 ° C Bleach-fixer 90 sec 36 ° C Watering 120 sec 22 ° C dry
  • the processing baths had the following composition: First developer water 900 ml EDTA 2 g HEDP, 60% by weight 0.5 ml Sodium sulfite 7 g Sodium chloride 2 g Hydroquinone sulfonic acid, potassium salt 15 g 1-phenyl-pyrazolidone-3 (phenidone) 0.3 g Potassium carbonate 10 g Second developer water 900 ml EDTA 2 g HEDP, 60% by weight 0.5 ml Sodium chloride 1 g N, N-diethylhydroxylamine, 85% by weight 5 ml 4- (N-ethyl-N-2-methanesulfonylaminoethyl) -2-methylphenylenediamine sesquisulfate monohydrate (CD 3), 50% by weight 8 ml Potassium carbonate 25 g pH adjustment to pH 10 with KOH or, H2SO4; Make up to 1 liter with water.
  • Bleach-fix bath water 800 ml EDTA 4 g Ammonium thiosulfate 100 g Sodium sulfite 15 g Ammonium iron EDTA complex 60 g 3-mercapto-1,2,4-triazole 2 g pH adjustment to pH 7.3 with ammonia or acetic acid; Make up to 1 liter with water.
  • Example 2 The procedure is as in Example 1, but an additional homogeneous, i.e. non-imagewise exposure made.
  • the amount of light required and the filtering for this homogeneous exposure are determined as follows:
  • the amount of light of the homogeneous pre-exposure is to be measured in such a way that color densities of x density units above minimum densities are generated on the color paper used, provided that the color paper without SW initial development is only subjected to color development and bleach fixation + washing.
  • the filtering of the homogeneous pre-exposure should be selected so that the 3 color layers do not necessarily develop the same (i.e. x ⁇ y ⁇ z) density units over minimum density, as explained below
  • the color matching of the shadows can also be selectively controlled in this system and thus compensate for any tilting tendencies that may be present in the original but not desired.
  • the homogeneous exposure is filtered in such a way that the densities specified in Example 2b) reach approximately the following values: gb pp bg a) 0.80 0.60 0.14 for blue-green shadows b) 0.80 0.60 0.40 for neutral shadows c) 0.80 0.60 0.80 for strong red shadows
  • the color densities during color development and bleach fixation according to 2 b are increased and the effect on the reduction in gradation with complete reversal development is increased, see FIG. 1.
  • the results are best characterized by the gradation values (gamma 2) and the maximum densities.
  • Gamma 2 Maximum densities gb pp bg gb pp bg 1 212 224 253 265 258 2nd 170 170 165 232 243 244 3rd a 172 174 210 240 251 259 b 170 170 165 232 243 244 c 172 170 131 235 242 209

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
EP90110762A 1989-06-20 1990-06-07 Verfahren zur Herstellung von farbfotografischen Kopien Withdrawn EP0408882A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920084 1989-06-20
DE3920084A DE3920084A1 (de) 1989-06-20 1989-06-20 Verfahren zur herstellung von farbfotografischen kopien

Publications (1)

Publication Number Publication Date
EP0408882A1 true EP0408882A1 (de) 1991-01-23

Family

ID=6383110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110762A Withdrawn EP0408882A1 (de) 1989-06-20 1990-06-07 Verfahren zur Herstellung von farbfotografischen Kopien

Country Status (4)

Country Link
US (1) US5135841A (ja)
EP (1) EP0408882A1 (ja)
JP (1) JPH0337648A (ja)
DE (1) DE3920084A1 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021831A (en) * 1974-02-05 1977-05-13 Elinca S.A. Process and device for the photographic reproduction of diapositives
EP0364845A2 (de) * 1988-10-20 1990-04-25 Agfa-Gevaert AG Fotografisches Umkehrverfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56137350A (en) * 1980-03-28 1981-10-27 Konishiroku Photo Ind Co Ltd Optical fog exposing method for direct positive color photography
JPS5870223A (ja) * 1981-10-22 1983-04-26 Konishiroku Photo Ind Co Ltd 直接ポジ画像形成方法
JPS59135459A (ja) * 1983-01-24 1984-08-03 Fuji Photo Film Co Ltd 画像形成方法
GB2212296B (en) * 1987-11-11 1992-02-12 Fuji Photo Film Co Ltd Method for forming a color image and image forming apparatus therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021831A (en) * 1974-02-05 1977-05-13 Elinca S.A. Process and device for the photographic reproduction of diapositives
EP0364845A2 (de) * 1988-10-20 1990-04-25 Agfa-Gevaert AG Fotografisches Umkehrverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FOTO HOBBY LABOR *

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Publication number Publication date
DE3920084A1 (de) 1991-01-10
JPH0337648A (ja) 1991-02-19
US5135841A (en) 1992-08-04

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