US2544877A - Bichromate sensitized photographic materials - Google Patents

Bichromate sensitized photographic materials Download PDF

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Publication number
US2544877A
US2544877A US745734A US74573447A US2544877A US 2544877 A US2544877 A US 2544877A US 745734 A US745734 A US 745734A US 74573447 A US74573447 A US 74573447A US 2544877 A US2544877 A US 2544877A
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US
United States
Prior art keywords
sensitive
coated
bichromate
photographic materials
support
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
US745734A
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English (en)
Inventor
Robert S Bryce
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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
Priority to FR965673D priority Critical patent/FR965673A/fr
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US745734A priority patent/US2544877A/en
Priority to GB1463/48A priority patent/GB640313A/en
Application granted granted Critical
Publication of US2544877A publication Critical patent/US2544877A/en
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
    • G03C1/66—Compositions containing chromates as photosensitive substances

Definitions

  • This invention relates to the preparation of sensitive photographic materials and particularly to bichromate sensitized photographic materials.
  • Resin dispersions which may be used for this purpose are aqueous dispersions of an acrylate resin such as polymethyl acrylate and polyethyl acrylate, a polystyrene dispersion, a polyvinyl acetate dispersion and neoprene latex.
  • a dispersion of plasticized cellulose nitrate in water may also be employed.
  • the mixture may also contain a wetting or dispersing agent such as a sodium alkyl sulfate or a polyethylene glycol and a plasticizing agent such as glycerol or ethylene glycol.
  • the sensitive layer maycontain white pigments such as titanium dioxide or 001- cred oxidizers such as carbon black, cobalt blue or yellow ochre.
  • Staehle application Ser. No. 558,346 is suitable for coating on glass, metal, plastics, rubber, etc., to form light-sensitive coatings in which a reversal image may be formed by washing away the exposed portions of the layer.
  • One disadvantage of this process is that the exposed areas sometimes cling tenacious- 1y to the support on which the sensitive layer is coated and cannot be washed away to form a clean image, without the use of an abrasive. This is especially true of the sensitive material of Staehle application Ser. No. 558,346 containing titanium dioxide or other pigments, or containing dyes as described in Staehle application Ser. No. 745,736, filed May 3, 1947.
  • a further object is to provide a bichromate sensitized hydrophilic colloid material containing an aqueous dispersion of a soft, synthetic resin and also containing a material which will permit a clean breakaway of the exposed portions from the support on which the material is 2 coated.
  • a water-soluble phosphate such as an alkali metal or ammonium phosphate.
  • a solution of sodium hexametaphosphate or other phosphate and pigment are mixed in a ball mill, and a gelatin solution, acrylate resin dispersion, such as polymethyl acrylate or polyethyl acrylate, and sensitizer such as ammonium or potassium bichromate are added.
  • acrylate resin dispersion such as polymethyl acrylate or polyethyl acrylate
  • sensitizer such as ammonium or potassium bichromate
  • the sensitized material produced in this way may be coated immediately on a support by spraying, brushing or other suitable manner of application or the sensitive mixture may be stirred for extended periods of time prior to coating.
  • the support Before the sensitive material is coated on the support, it is generally desirable to coat the support with a primer. Numerous materials are available for this purpose. In some instances, the support may be rubbed with turpentine to produce a prime coat or various synthetic resin or cellulose ester primers may be used.
  • a satisfactory primer is a solution of polyvinyl butyral in ethyl alcohol, isopropyl alcohol and Cellosolve ethylene glycol ethyl ether.
  • Other suitable primers are solutions of phenol-formaldehyde, urea-formaldehyde, unmodified phenolic resin, ethyl cellulose, and half-second cellulose nitrate.
  • a sensitive material capable of producing a blue reversal image is produced by adding the following to a ball mill and grinding for 48 hours.
  • the sensitive material is used by spraying onto a support primed with one of the primers described above.
  • the primer is unnecessary as, for example, where the sensitive material is coated on a polystyrene support.
  • After coating the sensitive material on the support it is exposed through a positive to a high intensity light and is then placed in-warm water or in warm water to which a small amount, for example, 1% of ammonium hydroxide has been added for a few seconds to swell the exposed areas.
  • the exposed layer is then washed with a stream of warm water for a few seconds to remove the swollen areas.
  • the layer now exhibits a blue positive image and is dried and coated if desired with a transparent lacquer or enamel to protect the finished image.
  • Ultramarine Blue Various pigments other than Ultramarine Blue may be used to color the sensitive material.
  • the following pigments may be used:
  • Fast Pigment Yellow (o-amino-p-sulfobenzoic acid and 1 phenyl 3 methyl-5-pyrazolone) Chrome Yellow D (13-naphthylaminemonosulfonic acid bromine and salicylic acid), Carbanthrene Red BNV (Color Index No. 1162), Carbanthrene Blue GCD (Color Index No. 1113), Carbanthrene Yellow G (Color Index No. 1118 and Lithosol Red CSP (Color Index No. 165).
  • halft'one transparent negatives are prepared of the three primary colors by any of several well-known means.
  • Halftone transparent positives are prepared from the negatives by either contact or projection printing followed by normal photographic processing.
  • a white support is then primed and any of the colored sensitive materials such as the red is coated on it.
  • the red coated plate is then exposed to light 5 throughthe red separation positive.
  • the exposed plate isprocessed and dried as described in the example above, except that no protective layer is coated on the finished image.
  • the red image is then overcoated with a primer or the second priming may be omitted, and the blue sensitive material is sprayed on the plate.
  • the plate is then exposed to light through the separation positive in register with the red image and the plate processed and dried as before.
  • the plate is again primed if desired and coated with the yellow sensitive material. It is then exposed to the yellow separation positive in register with the red and blue images. It is processed and dried as before to produce a complete full colored picture. If desired, it may be coated with a transparent protective overcoat or a black key image can be added to it by the use of a black sensitive coating and processing.
  • a continuous tone full-colored picture can be made in the same manner as a halftone picture using continuous tone separation .positives. However, since some of the pigments are of an opaque nature, it is preferable to use transparent colored dyes or pigments for this purpose.
  • a light-sensitive coating composition comprising a. mixture of a bichromated gelatin, an aqueous dispersion of a water-insoluble soft synthetic resincapable of drying to a continuous film when thedispersion alone is coated onglass and said resinbeing selected from the group consisting of acrylate, styrene, vinyl ester and neoprene resins, a, pigment and sodium hexametaphosphate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paints Or Removers (AREA)
US745734A 1947-05-03 1947-05-03 Bichromate sensitized photographic materials Expired - Lifetime US2544877A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR965673D FR965673A (enrdf_load_html_response) 1947-05-03
US745734A US2544877A (en) 1947-05-03 1947-05-03 Bichromate sensitized photographic materials
GB1463/48A GB640313A (en) 1947-05-03 1948-01-16 Improvements in the production of photographic relief images, and in light sensitivecompositions therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US745734A US2544877A (en) 1947-05-03 1947-05-03 Bichromate sensitized photographic materials

Publications (1)

Publication Number Publication Date
US2544877A true US2544877A (en) 1951-03-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US745734A Expired - Lifetime US2544877A (en) 1947-05-03 1947-05-03 Bichromate sensitized photographic materials

Country Status (3)

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US (1) US2544877A (enrdf_load_html_response)
FR (1) FR965673A (enrdf_load_html_response)
GB (1) GB640313A (enrdf_load_html_response)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624672A (en) * 1948-03-01 1953-01-06 Warren S D Co Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound
US2624673A (en) * 1948-03-01 1953-01-06 Warren S D Co Photosensitive printing plate having a light-sensitive coating consisting of a nonprotein colloid, a phosphate, and a chromium compound
US2858214A (en) * 1955-09-30 1958-10-28 Lawrence L Pries Light sensitive plate coating
US5057394A (en) * 1989-11-01 1991-10-15 Sanyo-Kokusaku Pulp Co., Ltd. Method of forming an image
US5264318A (en) * 1987-06-15 1993-11-23 Sanyo-Kokusaku Pulp Co., Ltd. Positive type photosensitive composition developable with water comprising a photocrosslinking agent, a water-soluble resin and an aqueous synthetic resin

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB228377A (en) * 1924-03-14 1925-02-05 William Henderson Wadhams Improved manufacture of colloid layers containing chromate colloids sensitive to light
US1981102A (en) * 1932-08-10 1934-11-20 Agfa Ansco Corp Photographic material and process of making the same
US2184310A (en) * 1937-06-10 1939-12-26 Du Pont Photographic and printing media
US2239284A (en) * 1934-12-28 1941-04-22 Hall Lab Inc Treatment of photographic films and plates
US2256390A (en) * 1936-08-19 1941-09-16 Eastman Kodak Co Method of preventing precipitation of alkaline-earth metal salts in gelatin
US2376005A (en) * 1943-04-10 1945-05-15 Defender Photo Supply Co Inc Photographic emulsion and process of making same
GB573771A (en) * 1943-11-16 1945-12-05 Kodak Ltd Improvements in the production of photographic relief images
US2476527A (en) * 1944-10-25 1949-07-19 Gen Aniline & Film Corp Reversible gel composition and method of preparation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB228377A (en) * 1924-03-14 1925-02-05 William Henderson Wadhams Improved manufacture of colloid layers containing chromate colloids sensitive to light
US1981102A (en) * 1932-08-10 1934-11-20 Agfa Ansco Corp Photographic material and process of making the same
US2239284A (en) * 1934-12-28 1941-04-22 Hall Lab Inc Treatment of photographic films and plates
US2256390A (en) * 1936-08-19 1941-09-16 Eastman Kodak Co Method of preventing precipitation of alkaline-earth metal salts in gelatin
US2184310A (en) * 1937-06-10 1939-12-26 Du Pont Photographic and printing media
US2376005A (en) * 1943-04-10 1945-05-15 Defender Photo Supply Co Inc Photographic emulsion and process of making same
GB573771A (en) * 1943-11-16 1945-12-05 Kodak Ltd Improvements in the production of photographic relief images
US2476527A (en) * 1944-10-25 1949-07-19 Gen Aniline & Film Corp Reversible gel composition and method of preparation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624672A (en) * 1948-03-01 1953-01-06 Warren S D Co Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound
US2624673A (en) * 1948-03-01 1953-01-06 Warren S D Co Photosensitive printing plate having a light-sensitive coating consisting of a nonprotein colloid, a phosphate, and a chromium compound
US2858214A (en) * 1955-09-30 1958-10-28 Lawrence L Pries Light sensitive plate coating
US5264318A (en) * 1987-06-15 1993-11-23 Sanyo-Kokusaku Pulp Co., Ltd. Positive type photosensitive composition developable with water comprising a photocrosslinking agent, a water-soluble resin and an aqueous synthetic resin
US5057394A (en) * 1989-11-01 1991-10-15 Sanyo-Kokusaku Pulp Co., Ltd. Method of forming an image

Also Published As

Publication number Publication date
GB640313A (en) 1950-07-19
FR965673A (enrdf_load_html_response) 1950-09-19

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