US2020607A - Photographic material - Google Patents

Photographic material Download PDF

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Publication number
US2020607A
US2020607A US579350A US57935031A US2020607A US 2020607 A US2020607 A US 2020607A US 579350 A US579350 A US 579350A US 57935031 A US57935031 A US 57935031A US 2020607 A US2020607 A US 2020607A
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US
United States
Prior art keywords
layer
emulsion
layers
red
dyed
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
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US579350A
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English (en)
Inventor
Heymer Gerd
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.)
GAF Chemicals Corp
Original Assignee
Agfa Ansco Corp
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 Ansco Corp filed Critical Agfa Ansco Corp
Application granted granted Critical
Publication of US2020607A publication Critical patent/US2020607A/en
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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

Definitions

  • this difficulty is avoided by assimilating the gradation of the photographic layers used together and dyed each to have a diierent color by incorporating in at least one of these layers a filter dye which absorbs at least part of the spectral region to which the layer in question is penneable and sensitive.
  • the concentration of the lter dyes is regulated so that the gradations of the layers are equalized.
  • the colorations due to the iilterdyes are after exposure removed in a bath in which the photographic material is to be treated, for instance, in the developing bath, xing bath or another subsequent bath.
  • red layers to green layers of a flatter gradation for instance, methyl blue may be used. ⁇
  • the coloration produced by this dye is easily removed in an aqueous solution of sodium suliite.
  • a blue layer. vi'or instance. tartrazine is well appropriated, .which is lremovable by washing with water.
  • Green 'layers may be for altering the gradation additionally dyed with acidy iuchsine, the coloration produced being removable by an aqueous solution of sodium sulnte.- 'I'he 5 said removal o1 the filter dyes' usually' begins in f the usual, developing bath and is" complete in the acid fixing bath.
  • a light sensitive ⁇ emulsion layer is provided, one of which is dyed with Diamine green HS (see Schultz, Farbstoitabellen 1923, vol. II page38) and the other is dyed with Salicinorange 2 R, a dye made from 15 nitrobenzidine, salicylic acid vand- 2-hydroxynaphthalene--sulfonic4 acid, and with Benzo light red 8 B L (see' Schultz, Farbstofftabellen 1923, vol. II page 19. The red dyed emulsion.
  • Diamine green HS see Schultz, Farbstoitabellen 1923, vol. II page38
  • Salicinorange 2 R a dye made from 15 nitrobenzidine, salicylic acid vand- 2-hydroxynaphthalene--sulfonic4 acid
  • Benzo light red 8 B L see' Schultz, Farbstofftabellen 1923, vol. II page 19. The red dyed emulsion.
  • the proportion o f the dyes used forthe'said layer may be about the following: t 25 Parts by weight Salicinorange 2R 80 Benzo light red 8 vB L 4 l Methylblue- 0.5
  • the concentration of the -dyes in the single layers ' is chosen in such a manner that the red layer and the green layer give together a suitable black.
  • the gamma value of the green layer is about 0.9 and that of the red 1ayer witnot addi- 35 tion of methyl blue 1.5 to 2.v After the addition l of methyl blue the gamma value of the red lay- I er likewise is about 0.9.
  • a three-color iilm may proceed, for instance, as follows: 40
  • the first emulsmn layer is colored blue green by Brilliant benzo fast green.
  • the second emulsion layer is colored purple by Sirius red violet R (ci. Chemischcs Centralblatt 1928, vol. '1, page. 2461) or Sirius rubine B ⁇ (ci. Chemisches Cen- 45 tralblatt 1931, vol. 2, page 364).
  • the third emulsion layerA is colored yellow by Benzo light yellow RL (ci. Fierz-David Knstliche organische Farbstoie 1926, page 168) Aor Chrysophenine G extra (ci. Schultz, Farbstotabellen 1'93l/JDC/ 50 726).
  • the sensitiveness to red, green and blue light may be altered respectively -by methylv blue, acid fuchsine and tartrazine.
  • Fig. 1 shows a section 55 through the support a provided on one of its faces with a light sensitive emulsion' layer b and on.
  • the layer c comprises an emulsion layer dyed yellow sensitized for green andcontaining a red filter dye.
  • the layer b comprisesan emulsion layer dyed purple sensitized for red and'contain- ⁇ ing a blue-green lter dye.l
  • The'layer d comprises a blue sensitive emulsion layer dyed bluegreen and containing a yellow filter dye. 'I'he amount of lter dye incorporated in each emulsion layer,A is thus selectedvthat the gradations of these layers are equalized.
  • filter dye to one of the emulsion layers can be dispensed withif the gradations of the reina' ing two layers are equalized tothe gradation of the emulsion layer having the flattest gradation.
  • the quantity of the dye which is necessary forl the equalization of the gradations depends upon the gradation and the sensitization of the emul- 30 sion used, upon the thickness of the layer and upon the kind of development. I do not wish to limit my invention to theforegoing examples nor to the specific details given therein. Numerous other embodiments are possible and I contemplate as included within my invention all such l modifications and equivalentsias fall within the scope of the appended claims.
  • a photographic material comprisingA a ⁇ support, on one face of said support a light-sensitive emulsion layersensitized for green and dyed with *l Diamin Green HS and on the other face a lightsensitive emulsion layer sensitized for red and dyed with a mixture of -Salycin Orange RR and 5 Benzo light red 8 BL, the red dyed emulsion containing furthermore a substantial amount of Methyl Blue for Kequalizlng the gradationA of the red layer to that of the green layer.
  • a photographic material comprising a sup? port and at least vtwo superimposed emulsion layers dyed to have different colors and colored for the same color to which the respective layer is specially sensitive, at least one of these emulsion layers containing furthermore a lter dye, soluble 15 l in the photographic treating baths, which absorbs at least part of the spectral region which is transmittcd by the color of this layer andto which this layer is sensitive, for equalizing the gradation of the emulsion layers.
  • A' photographic material comprising a support and at least two superimposed emulsion layers insuperpositionbeingdyed to have dierent colors and colored forth'e same color to which the respective layer is specially sensitive, at least one A'of 25 these emulsion layers containing furthermore a ,filter dye, soluble in the photographic treating baths, which absorbs atleast part of the spectral. region which is transmitted by the color of this layer and to which this layer is sensitive, for
  • a photographic material comprising a support and at least two superimposed emulsion layers arranged on both faces .of the'support, said ,emulsion layers being dyed to have different colors and colored for the same color to which the respective layer is specially sensitive, at least one of these emulsion layers containing furthermore a filter dye, soluble in the photographic treating baths, which absorbs at least part of the special 40 region which is transmitted by the color of this layer and to which this layer is sensitive, for equalizing the gradation of the emulsionlayers.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Spectrometry And Color Measurement (AREA)
US579350A 1930-12-06 1931-12-05 Photographic material Expired - Lifetime US2020607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE5706374 1930-12-06

Publications (1)

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US2020607A true US2020607A (en) 1935-11-12

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US579350A Expired - Lifetime US2020607A (en) 1930-12-06 1931-12-05 Photographic material

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US (1) US2020607A (en(2012))
BE (1) BE384599A (en(2012))
GB (1) GB379934A (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667414A (en) * 1947-04-29 1954-01-26 Raibourn Paul Light-sensitive color photographic film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667414A (en) * 1947-04-29 1954-01-26 Raibourn Paul Light-sensitive color photographic film

Also Published As

Publication number Publication date
GB379934A (en) 1932-09-08
BE384599A (en(2012))

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