US2095018A - Manufacture of antihalation layers - Google Patents

Manufacture of antihalation layers Download PDF

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Publication number
US2095018A
US2095018A US746474A US74647434A US2095018A US 2095018 A US2095018 A US 2095018A US 746474 A US746474 A US 746474A US 74647434 A US74647434 A US 74647434A US 2095018 A US2095018 A US 2095018A
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US
United States
Prior art keywords
pyrolusite
layers
layer
manufacture
halation
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
US746474A
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English (en)
Inventor
Wilmanns Gustav
Bitterfeld Wolfen Kreis
Schneider Wilhelm
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 US2095018A publication Critical patent/US2095018A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • Y10S430/151—Matting or other surface reflectivity altering material

Definitions

  • Our present invention relates to the manufacture of anti-halation layers and more particularly to the manufacture of anti-halation layers from pyrolusite.
  • pyrolusite layers consisting;-,of higher hydrated oxides of manganese in gelatin, as anti-halation layers.
  • This pyrolusite is produced in the gelatin in colloidal form by causing potassium permanganate solution to act on gelatin or by reducing potasslum permanganate by means of manganous salts in the presence of gelatin or other colloid to form manganese dioxide.
  • potassium permanganate solution to act on gelatin
  • potasslum permanganate by means of manganous salts in the presence of gelatin or other colloid to form manganese dioxide.
  • a photographically satisfactory anti-halation layer and filter layer is obtained on the one hand by bringing the size of the particles of pyrolusite to about 0.1 to 5 and on the other hand by thermally treating, for example, by an intense drying at about 100 C. to
  • a suitable pyrolusite can be produced by reduction of potassium permanganate (with alcohol, for example) in aqueous solution. After the pyrolusite formed has been separated it is dried at about 130 C. It
  • the layer may then, if necessary, be ground in known manher; and when a suspension of it in a colloid swellable in water such as gelatin or casein is cast as an anti-halatlon layer, the layer exhibits none of the harmful-effects on the photographic emulsion which are caused by colloidal pyrolusite in the gelatin.
  • the pyrolusite of the anti-halation filter layers according to this invention is soluble in the fixing bath so that the layers are decolorized in this bath.
  • a process of manufacturing anti-halation layers or filter layers whichcomprises producing pyrolusite from potassium permanganate by reduction, drying said pyrolusite at a temperature of about 130 C., disintegrating the dried pyrolusite to particles of about 0.1 to 5; diameter, suspending said disintegrated pyrolusite in the solution of a colloid swellable in water, and casting said suspension to form an anti-halation layer or filter layer.
  • a process of manufacturing anti-halation layers or filter layers which comprises producing pyrolusite from potassium permanganate by reduction, drying said pyrolusite at a temperature of about 130 C., disintegrating the dried pyro lusite to particles of about 0.1 to fiadiameter, suspending said disintegrated pyrolusite in a. solution of gelatin, and castingsaid suspension to form an anti-halation layer or filter layer.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Colloid Chemistry (AREA)
US746474A 1933-10-04 1934-10-01 Manufacture of antihalation layers Expired - Lifetime US2095018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE443790X 1933-10-04

Publications (1)

Publication Number Publication Date
US2095018A true US2095018A (en) 1937-10-05

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ID=6531518

Family Applications (1)

Application Number Title Priority Date Filing Date
US746474A Expired - Lifetime US2095018A (en) 1933-10-04 1934-10-01 Manufacture of antihalation layers

Country Status (4)

Country Link
US (1) US2095018A (tr)
BE (1) BE405367A (tr)
FR (1) FR778934A (tr)
GB (1) GB443790A (tr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706686A (en) * 1952-10-01 1955-04-19 Eastman Kodak Co Method of lacquering photographic emulsions and products produced thereby
US2993793A (en) * 1954-02-16 1961-07-25 Gevaert Photo Prod Nv Manufacture of noncurling multilayer material
US3010390A (en) * 1954-06-29 1961-11-28 Buskes Willem Marie Planographic printing plates
US3091535A (en) * 1959-12-31 1963-05-28 Photographic
US3332792A (en) * 1963-09-27 1967-07-25 Gen Aniline & Film Corp Manufacture of antihalation layers
US3640748A (en) * 1965-08-16 1972-02-08 Gaf Corp Antihalation photographic media and method of preparation
US3856529A (en) * 1967-05-26 1974-12-24 Kalle Ag Method and materials for making half tone prints

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706686A (en) * 1952-10-01 1955-04-19 Eastman Kodak Co Method of lacquering photographic emulsions and products produced thereby
US2993793A (en) * 1954-02-16 1961-07-25 Gevaert Photo Prod Nv Manufacture of noncurling multilayer material
US3010390A (en) * 1954-06-29 1961-11-28 Buskes Willem Marie Planographic printing plates
US3091535A (en) * 1959-12-31 1963-05-28 Photographic
US3332792A (en) * 1963-09-27 1967-07-25 Gen Aniline & Film Corp Manufacture of antihalation layers
US3627694A (en) * 1963-09-27 1971-12-14 Gen Aniline & Film Corp Production of aqueous suspension of manganese dioxide
US3640748A (en) * 1965-08-16 1972-02-08 Gaf Corp Antihalation photographic media and method of preparation
US3856529A (en) * 1967-05-26 1974-12-24 Kalle Ag Method and materials for making half tone prints

Also Published As

Publication number Publication date
GB443790A (en) 1936-03-05
BE405367A (tr)
FR778934A (fr) 1935-03-26

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