US2968556A - Multi layer photographic materials containing dyes having sharp green absorption - Google Patents

Multi layer photographic materials containing dyes having sharp green absorption Download PDF

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Publication number
US2968556A
US2968556A US590960A US59096056A US2968556A US 2968556 A US2968556 A US 2968556A US 590960 A US590960 A US 590960A US 59096056 A US59096056 A US 59096056A US 2968556 A US2968556 A US 2968556A
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United States
Prior art keywords
layer
green
absorption
sensitive
materials containing
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Expired - Lifetime
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US590960A
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English (en)
Inventor
Riester Oskar
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Agfa Gevaert NV
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Agfa AG
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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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/83—Organic dyestuffs therefor
    • G03C1/832—Methine or polymethine dyes

Definitions

  • Dyestuffs which transform surprisingly readily into a special and more highly associated form, whereby they simultaneously become resistant to diffusion and assume remarkably sharp absorption, are for example rhodacyanines, benzimidazol carbocyanines, and benzoxo- 'carbocyanines, which latter preferably carry phenyl radicals in the 6-position of the benzoxazole ring or benzene rings anellated in 5 and 6 position.
  • the preparation of the rhodacyanines is disclosed in German Patents Number 890,249 and Number 930,275.
  • the preparations of the other dyestuffs are respectively disclosed in German Patent Nos. 714,764, 733,026, 929,080, and 936,644 as well as in US. Patent No. 2,739,149.
  • the resistance to diffusion in the first place makes it possible for them to be used at all for the desired selective exclusion of the incorrect sensitivity.
  • the particularly high selectivity which is produced by the association' of these dyestuffs renders it possible for the redsensitivity of the lowermost layer to be satisfactorily ob tained, this being particularly valuable in order to obtain the high general sensitivity which is absolutely necessary.
  • This selectivity is even so great that it is scarcely any longer necessary to remove these dyestuffs in the subsequent photographic processing, but they even have a favourable effect in the copying process, in that they produce further selectivity due to their filtering effect on the positive material.
  • Figure 1 shows a multilayer material for negative exposures, in which are indicated the sensitivity ranges of the three light-sensitive layers 1, 2, 3 and also the absorption ranges of the yellow filter layer 4 and the green filter layer 5.
  • Figure 2 shows a multi-layer material which is suitable for the production of copies from negative colour images on materials according to Figure l.
  • the sensitivity ranges of the lightsensitive layers, 6, 7, 8 and the. absorption range of the yellow filter layer 9 are shown in Figure 2.
  • Suitable dyestuffs for the filter layer 5 are the rhoda- 'cyanines of the formulae:
  • Such a material is "shown 'in Figure 3.
  • the sensitivity ranges of the light-sensitive layers 10, ll, '12 and the absor'p'tion ranges of the yellow filter layer -13 andthe green filter layer 14 are shown in this figure.
  • the associated positive is the same as indicated in Example 1, it being of course also possible for the layer sequence to be changed, that is to say, the blue-sensitive layer can-be followed by a yellow filter layer and then by the-red-sensitive layer, the green sensitive layer only following at the last layer.
  • the green filter layer has added thereto mixtures rhodacyanines of the following formulae:
  • the absolute maximum is at 525 mp.
  • the dyestuff can be added to the gelatine as a solution in methanol or in dilute acetic acid; in the latter case the gelatine is adjusted neutral or weakly alkaline by addition of organic or inorganic alkaline.
  • I- or Ilw/ provides a narrow absorption at a maximum of 585 mg.
  • the above two dyestuffs can be removed even after the developing and fixing process by after-treatment With dilute acids or by the interaction of any treatment solutions usually employed in photographic processes, if these treatment solutions show an acid reaction.
  • the constitutions indicated can of course be replaced by the mesomeric forms; they are merely to be interpreted as recording formulae and do not represent any limitation.
  • the dyestuffs can be introduced into a layer which consists wholly or in part of gelatine, polyvinyl alcohol, starch, dextrin, etc., and also of mixtures of such layerforrning substances, which in their turn can .be mixed with substances for varying the viscosity, such as polyacrylic acids, copolymers of maleic acid and styrene etc.
  • the dyestuffs can be introduced in the form of their solutions in an organic solvent, such as for example methanol, or even inwater, or can be supplied by the filter layer being placed in a bath.
  • solubility thereof may be increased by adding organic or inorganic salts.
  • a multi-layer emulsion combination for making multi-color photographs said combination having a support, a layer of red-sensitive silver halide emulsion on said support, a filter layer having sharp green absorption over said emulsion, a layer of green-sensitive silver halide emulsion over the green filter layer, a yellow filter layer "16 over said layer of green-sensitive emulsion, and a layer of blue-sensitive silver halide emulsion over the yellow filter layer, said sharp green absorption being producted by dyestufi selected from the class consisting of the formulae 0411s SO:- I

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Filters (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US590960A 1955-06-15 1956-06-12 Multi layer photographic materials containing dyes having sharp green absorption Expired - Lifetime US2968556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE822616X 1955-06-15

Publications (1)

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US2968556A true US2968556A (en) 1961-01-17

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US590960A Expired - Lifetime US2968556A (en) 1955-06-15 1956-06-12 Multi layer photographic materials containing dyes having sharp green absorption

Country Status (4)

Country Link
US (1) US2968556A (enrdf_load_stackoverflow)
BE (1) BE548641A (enrdf_load_stackoverflow)
FR (1) FR1151605A (enrdf_load_stackoverflow)
GB (1) GB822616A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61137149A (ja) * 1984-11-26 1986-06-24 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニー カラー写真要素

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511419B1 (enrdf_load_stackoverflow) * 1971-02-09 1976-01-17
JPS5220830A (en) * 1975-08-11 1977-02-17 Fuji Photo Film Co Ltd Color photographic light sensitive material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878961A (en) * 1930-04-28 1932-09-20 Eastman Kodak Co Photographic element overcoated with alpha screening dye
US2112226A (en) * 1936-10-24 1938-03-29 Du Pont Film Mfg Corp Tripack
US2231659A (en) * 1939-05-09 1941-02-11 Eastman Kodak Co Polymethine dye intermediates
US2628901A (en) * 1950-12-30 1953-02-17 Gen Aniline & Film Corp Process of preparing tricolor separations
US2739149A (en) * 1953-02-27 1956-03-20 Eastman Kodak Co Symmetrical carbocyanine dyes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878961A (en) * 1930-04-28 1932-09-20 Eastman Kodak Co Photographic element overcoated with alpha screening dye
US2112226A (en) * 1936-10-24 1938-03-29 Du Pont Film Mfg Corp Tripack
US2231659A (en) * 1939-05-09 1941-02-11 Eastman Kodak Co Polymethine dye intermediates
US2628901A (en) * 1950-12-30 1953-02-17 Gen Aniline & Film Corp Process of preparing tricolor separations
US2739149A (en) * 1953-02-27 1956-03-20 Eastman Kodak Co Symmetrical carbocyanine dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61137149A (ja) * 1984-11-26 1986-06-24 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニー カラー写真要素

Also Published As

Publication number Publication date
BE548641A (enrdf_load_stackoverflow)
FR1151605A (fr) 1958-02-03
GB822616A (en) 1959-10-28

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