US2312543A - Photographic printing material and process for using the same - Google Patents

Photographic printing material and process for using the same Download PDF

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Publication number
US2312543A
US2312543A US284103A US28410339A US2312543A US 2312543 A US2312543 A US 2312543A US 284103 A US284103 A US 284103A US 28410339 A US28410339 A US 28410339A US 2312543 A US2312543 A US 2312543A
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layer
light
sensitive
image
blue
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US284103A
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English (en)
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Goldfinger Paul
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Chromogen Inc
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Chromogen Inc
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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
    • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/145—Infrared

Definitions

  • the present invention relates to a process for the production of color photographic images especially three color images by the use of a three layer taking material and a printing material containing three image layers which may, prior to exposure, contain the three dyes necessary for forming the image namely a blue-green, a, magenta and a yellow dye.
  • multi-layer materials containing pre-dyed layers can only be used in certain cases, i. e. if each one of the layersssontains a dye which is transparent for light of the component color which is to be recorded in the layer itself and also transparent for light of the component colors to be recorded in the subsequent layers. If, in the taking material, the blue comfponent color part-image is to be recorded in the i/ppermost layer then this layer must be transparent for blue light rays and also transparent for the green and the red light which is to be recorded in the subsequent layers. In prior specications, the applicant has already described taking materials, the front layer of which is colorless during the exposure and is dyed thereafter whereas the second layer contains a yellow dye serving as a light lter and subsequently for forming the image.
  • a new printing material is used and the treatment of the taking material is adjusted to the properties of the printing materials in a denite manner, i. e. in such a manner that the image formed in ⁇ the taking material can be printed onto the three layer printing material containing three layers of definite coloring.
  • This process therefore allows the use of materials in which all the layers of the printing material are pre-dyed deiinitely during their preparation ranged as the rear layer and that the magenta and blue-green colored emulsion layers for the two other part-images are superimposed on the yellow emulsion layer. To render the exposure of such a material possible each o'i the three lay-1 ers is differently sensitized.
  • the rear layer which is sensitive to the outermost part of the visible red light or for infra-red light is colored yellow.
  • the adjacent layer is sensitized for blue light and the uppermost layer is sensitized for either red or green.
  • the uppermost emulsion layer is prepared from an emulsion which is many times less light-sensitive than the blue-sensitive emulsion lying below.
  • the front layer cannot be made with such a low sensitivity that, on the one hand, the blue light rays have practically no eect on this layer and yet, on the other hand, the green or red light rays are recorded to a suillcient extent ln spite of the necessarily short exposure times and limited light intensities available for the exposure. I'his consideration. is of no importance for a printing material because there is greater freedom in the choice of the printing light intensity rays in the blue-sensitive middle layer can be ascertained by calculation. The following convhigher the latitude of the object.
  • the dye-images reproduce the latitude and the gradations of brightness of the object in a. true and aesthetically pleasing manner.
  • the colored image in the master image must graduate the printing light used for its printing in an image-like manner. Consequently, it is necessary for the production of a photographic copy showing suiilcient brightness delatitude of the object, i. e. at least 0.4 D. Ifthe printing light whose diierences at the brightest and darkest places are at least about 0.4 D in logarithm units is to iniluence only the bluesensitive layer .but not the green-'sensitive layer situated above, the green-sensitive layer must be at least numerus i.
  • the antilog of 0.4 D times less sensitive for blue light than the green-sensitive layer is sensitive for the blue printing light.
  • a dye density of about 2.5 the green-sensitive layer must be at least numerus 0.4 times 2.5, i. e. one logarithm unit or ten times less sensitive than the layer lying beneath.
  • an even greater decrease in the sensitivity is to be preferred because this decrease can berelatively easily equalized by increasing the intensity of the printing light.
  • FIG. 1 illustrates one arrangement of colorings and sensitivities
  • Fig. 2 illustrates a modication of the material shown in Fig. 1.
  • the front layer i contains a blue-green Adye of the same kind, which is transparent for infra-red light, for example, the -naphthochinolinium salt of diamine sky blue FF (Schultz 1 c., No. 510).
  • the layers I, 2 and 3 are sensitive respectively to green, blue and red or infra-red light.
  • sensitizers there can be used for red, pinacyanol; for green, benzothiopseudocyanine-ethyliodide and for infra-red kryptocyanine.
  • layer I is a low speed silver bromide emulsion having, ⁇ for example, a sensitivity of 1,500 or even 1/000 of the sensitivity of layer' 2.
  • a three layer film is used, the front layer being vblue-sensitive and uncolored during the exposure, the middle layer being green-sensitive and'colored yellow by the diphenyl-guanidine salt of Chrysophenine Gand the rear layer being red-sensitive and colored magenta by Benzopurpurine 10 B (Schultz l. c., No. 489).
  • green part-image by a yellow colored part-image already stated above the blue-sensitive layer 2 generally contains no further sensitizer but it contains only a dye for the formation of the imn: e, i. e. for example, a magenta dye such as the phenyl-guanidine salt of chlorantine red 8 B hultz Farbstotabellen, Stuttgart 1931, vol.1,
  • This image is printed onto the new printing material described above with blue. ⁇ green and infra-red light by an optical or contact process.
  • 'I'he printing light may vcomprise a mixture of these light rays or the different printing lights can be employed one after ,the other.
  • t the printing light is graduatedin an image-like manner by the part-image of the master image which consists of infra-red absorbing dye and which corresponds to the blue part-image.
  • the infra-red part of the light acts on the rear layer 3v of the printing material which is sensitive to infra-red and forms a latent image oi' the blue extract on the afore-A mentioned layer.
  • the green portion of the printing light is graduated in an image-like fashion by the part-image of the master image consisting of magenta dye and corresponding to the red part-image and acts on the uppermost layer I of the printing material, which is sensitive for green light and colored blue-green, and in which it forms a latent image of the red part-image. 4
  • the time of exposure or the intensity of the green printing -light or its proportion in -the mixture of the different printing lights is increased to such an extent, that in spite of the layers lower sensitivity for example, to 1000 times less. a. suiilcient exposure'of the, iront layer to green light is obtained.
  • the blue portion of the printing light-does not act on the unsensitive front layer I but it is graduated in an image-like manner bythe yellow dye-image of the master image which corresponda to the green part-image and it acts, after As indicated by legends on Fig.
  • the blue-green dyed positive oi the red part-image i. e. the color-correct reproduction ofthe photographed object.
  • the example given above represents one manner of carrying out the invention; another manner of carrying out the same consists brieiiy in using a taking material in which the front layer is blue-sensitive and colorless, the second layer red-sensitive and dyed yellow and the third layer green-sensitive and dyed blue-green.
  • The'ront layer is treated after the exposure with a substance which absorbs infra-red and which is practically transparent for the whole of the visibie spectrum and this substance is nxed at the nnexposed parts in an image-like manner.
  • a printing material such as shown in Fig.
  • red and blue light is used for printing.
  • the same printing material can obviously also be used in other cases, for example, if the top colorless layer in the taking material is not to be converted into a dye-image but is used 'for the production ci a black silver image.
  • This silver inage must be a positive if the dyes in the other layers are to be :formed as positive dye-images and vice versa.
  • there is used as the taking material a bil-paci: whose front layer is situated on a separate support.
  • the two other layers on the rear support can be of the same Sind as in the three layer taking material but the top one of these two layers can also be colorless ii a yellowfilter layer is arranged above the top layer, preferably behind the iront layer on the upper support only carrying one layer.
  • the dierent layers of the printing material may also contain additional filter dyes. which can be washed out or diiiusely destroyed and which are not used for forming the picture.
  • These filter dyes can also be present in special intermediate layers and the presence of a blue or magenta lter dye behind the. frontrlayer and the presence of a yellow filter dye behind the 'middle' layer is advisable so that the light rays for which the foregoing light-sensitive layer is tographic prints which comprises, printing the color sensation records from a three-color original onto a multilayer light-sensitive printing material,. developing and'converting the print into a dye image, said three-color original comprising an infra-red-absorbing record representing the blue color sensation of the object,
  • a yellow record representing a second color sensation and a dye-record representing the third color sensation of the object said dye-record being formed by a dye which is absorbent prev dominantly for light represented by said yellow record
  • said multilayer light-sensitive printing material comprising three dierently colored i is color sensitized for light represented by the yellow record in the said three-color original and the speed of the front emulsion being less than x16 of the speed of the blue-sensitive intermediate layer
  • the infra-red-sensitive layer comprising the yellow dye
  • the blue-sensitive intermediate layer comprising 'the dye which is selectively absorbent for light for which the front layer is predominantly color-sensitized
  • the front layer comprising the third of said three dyes
  • the step which comprises, printing the front layer of said printing material with light to which it is predominantly sensitized and having a timeintensity value sunicient to balance the exposure with respect to the blue sensitive intermediate layer of said printing material.
  • a light-sensitive multilayer printing material for the production of three-color pictures comprising three differently sensitized silverhalide emulsion layers in superposition on a single support, the iront layer being a light-sensitive emulsion layer comprising silver bromide and being sensitized to light other than blue light, the middle layer being arranged behind said front layer beingv a blue-sensitive silver halide emulsion, said front layer having a speed which is less than 1% of the speed of the blue-sensi tive layer arranged behind it, said blue-sensitive layer comprising a dye which is highly absorbent or light for which the front layer is sen'- sitized and which is transmittant for light for which the third layer is sensitive and the third layer being predominantly sensitive to light other than blue light and other than light to which said front layer is sensitive and effectively insensitive to blue light transmitted by said middle layer.
  • a light sensitive multilayer printing material for the production of threev color pictures comprising three diierently sensitized silver halide emulsion layers in superposition on a single support, the front layer being a light sensitive emulsion layer comprising silver bromide and being sensitized to light other than blue light, the middle layer arranged behind the said front layer being a blue-sensitive silver halide emulsion, said iront layer having a speed which is less than 116 of the speed of the blue-sensitive layer arranged behind it, and the third layer being predominantly sensitive to light other than blue light and other .than light to which. said front layer is sensitive and effectively insensitive to blue light transmitted by said middle layer;
  • a light sensitive multilayer printing material for the production of three color pictures comprising three differently sensitized silver halide emulsion layers in super-position on a single support, one layer being dyed blue-green, another magenta, and the other yellow with image forming dyes, the front layer being a light sensitive emulsion layer comprising silver bromide and being sensitized tov light other than blue light, the middle layer arranged behind said front layer being a blue sensitive silver halide emulsion, said front layer having a speed which is less than 116 oi' the speed of the blue sensitive layer arranged behind it, the third layer being predominantly sensitive to light other than blue light and other than light to which said front layer is sensitive and containing said yellow image forming dye, said front layer being dyed with a second one of said image forming dyes which transmits light to which the layer is sensitive, and said middle layer being dyed with the third one of said image forming dyes.
  • the iront layer being a light sensitive emulsion layer comprising silver:v bromide and being sensitized to light other than blue light
  • the middle layer arranged behind said front layer being a blue sensitive silver halide emulsion
  • said front layer having a 4speed which is. at its maximum, to the speed of said blue sensitive emulsion layer arranged behind it as 1 is to the numerus of the product oi' 0.4 times the over all density difference in logarithmic units of the three color picture to be produced and the third layer being predominantly sensitive to light other than blue light and other than light to which said front layer is sensitive and effectively insensitive tn blue light transmitted by said middle layer.
  • the front layer being a light sensitive emulsion layer comprising silver bromide and being sensitized to light other than blue light
  • the middle layer arranged behind said front layer being a blue-sensitive silver halide emulsion
  • said front layer having a speed which is, at its maximum, to the speed oi said blue sensitive :emulsion layer arranged ibehind' it as 1 is to the/merus ofthe product of 0.4 times the over all density difference in logarithmic units of the three color picture to beV produced
  • the third layer being predominantly sensitive to light other than blue light and other than light to which said iront layer is sensitive and containing said yellow image forming dye
  • said front layer being dyed with a second one of said image vforming dyes which transmits light to which the layer -is sensitive
  • said middle layer being dyed with the third one of said image forming dyes.
  • a light sensitive multilayer printing material for the production of three color pictures comprising three diierently sensitized silver light and other than light to which said front layer is sensitive and effectively insensitive to blue light transmitted by said middle layer, mid a removable illter dye carried by a layer behind said front layer for absorbing light rays to which said front layer is sensitized.
  • a ught sensitive material comprising a siii ver halide emulsion rear layer which is sensitive to infra-red light and is colored yellow, a bluesensitive silver halide emulsion middle layer colored blue-green and a magenta colored silver halide emulsion iront layer'comprising silver bromide and being sensitized to red, the front layer having a speed less than 11e of that of the blue-sensitive middle layer.
  • a process for producing multicolor photographic pictures from a multi-color image in a multilayer material wherein the one layer contains a blue part image formed from an infra,- red absorbing dye, another ⁇ layer contains a yellow dye image of a second part image and the third layer contains a third part imageiormed from a dye which transmits blue light, light ot a spectral range represented by said third part image and infra-red light, which comprises printing said multi-colored image onto a light sensitive multilayer printing material, comprising three diii'erently sensitized silver halide emulsion layers in' superDOsition on 'a single support,
  • the front 'layer being a light ⁇ sensitive silver the multi-colored material
  • the middle layer of the printing material being a blue-sensitive silver halide emulsion
  • the third layer of the printing material being a silver halide emulsion layer sensitized to infra-red
  • the front layer having a speed which is less than 11e of the speed of the blue-sensitive layer arranged behind it, the time-intensity value of the light used in printing animage into said cient to balance theY exposures necessary with respect to the blue-sensitive .middle layer; developing and producing superposed dye images which correspond tothe silver images in each of said layers.
  • Comprises printing in separate steps said black and white silver image with infra-red light and said multi-color image onto a light sensitive multilayer printing material comprising three differently sensitized silver halide emulsion layers in superposition on a single support, the front layer being a light sensitive silver halide emulsion which is inherently blue sensitive and which -is sensitized to light represented by the yellow colored part image in the multi-color material, the middle layer of the printing material being a blue-sensitive silver halide emulsion, the third layer of the print-n ing material being a silver halide emulsion layer sensitized to infra-red, and the front layer having a. speed which is less than 11a of the speed of the blue-sensitive layer arranged behind it,
  • the time-intensity value of the light used in printing an image into said front layer of said printing material being suiiicient to balance the exposure necessary with respect to the bluesensitive middle layer; developing and producing superposed dye images which correspond to. the silver images in each of said layers, the Adye image in the front layer of the printing material having a color complementary to the spectral range represented by said third part image, the. dye image in the rear layer of the printing material being yellow and, the dye image in the middle layer of the printing material having la color complementary to the spectral range represented by said second part image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US284103A 1938-07-12 1939-07-12 Photographic printing material and process for using the same Expired - Lifetime US2312543A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697036A (en) * 1949-11-23 1954-12-14 Eastman Kodak Co Multilayer photographic film having improved resolving power
US3050391A (en) * 1957-12-30 1962-08-21 Gen Aniline & Film Corp Photographic film with fine grain silver chloride underlayer
US3152907A (en) * 1959-11-12 1964-10-13 Eastman Kodak Co Method for controlling speed and contrast of photographic emulsions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697036A (en) * 1949-11-23 1954-12-14 Eastman Kodak Co Multilayer photographic film having improved resolving power
US3050391A (en) * 1957-12-30 1962-08-21 Gen Aniline & Film Corp Photographic film with fine grain silver chloride underlayer
US3152907A (en) * 1959-11-12 1964-10-13 Eastman Kodak Co Method for controlling speed and contrast of photographic emulsions

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FR857657A (fr) 1940-09-24
BE435408A (enrdf_load_stackoverflow)

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