US1942852A - Nonhalation backing for photographic film - Google Patents

Nonhalation backing for photographic film Download PDF

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Publication number
US1942852A
US1942852A US516046A US51604631A US1942852A US 1942852 A US1942852 A US 1942852A US 516046 A US516046 A US 516046A US 51604631 A US51604631 A US 51604631A US 1942852 A US1942852 A US 1942852A
Authority
US
United States
Prior art keywords
layer
wax
film
backing
soluble
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
US516046A
Other languages
English (en)
Inventor
Albert A Young
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
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US516046A priority Critical patent/US1942852A/en
Priority to DEK124262D priority patent/DE653197C/de
Priority to GB4558/32A priority patent/GB379984A/en
Priority to FR731478D priority patent/FR731478A/fr
Application granted granted Critical
Publication of US1942852A publication Critical patent/US1942852A/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
    • G03C1/76—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
    • G03C1/835—Macromolecular substances therefor, e.g. mordants
    • 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
    • Y10S430/156—Precursor compound
    • Y10S430/16—Blocked developers

Definitions

  • This invention relates to a photographic film bearing a backing or coating to prevent halation, the backing being removable or not during the processing oi the him, as desired.
  • Fig. 1 is a cross-sectional enlarged view of one embodiment of the invention and Fig. 2 is a cross-sectional enlarged view showing another embodiment.
  • I employ a layer of wax containing a dye, and I may apply this colored wax layer directly to the film support or use an undercoating which is soluble in the developing baths and place over this the colored wax layer.
  • the latter method is preferable as it is usually desirable to remove the colored layer without any extra step during the processing so that it will not interfere with printing or viewing the film.
  • a wax layer applied directly to the film support has also certain advantages.
  • FIG. 2 A preferred embodiment of my invention is illustrated in Figure 2 in which a layer 4 soluble in the developing baths is first coated on the film support 1 and over this is coatedv the dyed wax layer 3, both of the latter coatings being on the surface of the film support opposite the emulsion layer 2.
  • the soluble layer 4 consists of some substance which is easily soluble or disintegrated by the actionof the ordinary photographic developing baths. Such substances are casein, gum arabic, glutenin, gliadin, albumen, and alkali soluble cellulose derivatives such as cellulose aceto-lactate or cellulose aceto-tartrate.
  • This undercoating is also applied to the film in the usual type of coating machine and is dried before the dyed wax layer is applied.
  • This undercoating may be relatively insoluble in water alone, but must be soluble in either water or weak alkali and for the purposes of my invention must be partially soluble and easily disintegrated in the ordinary photographic developing baths. Any of the substances mentioned above will answer this requirement..
  • the coating 4 is relatively thin, that is, it will be of less thickness than the emulsion layer, though not necessarily so.
  • a dyed wax layer. 3 is applied on top of it, as indicated in Figure '2.
  • this dyed wax layer I may use any such solution of wax and a dye as given in Formulas I to III inclusive.
  • I may use a number of variations in this invention.
  • I may, for example, use more than one dye, one or more each in the soluble layer, and in the dyed wax layer.
  • I may use two complementary chres, one in the soluble layer and one in the dyed wax layer, complete absorption of all actinic light being thus assured.
  • I have used only a single black dye, but it is understood that I do not limit myself to any particular dye or combination of dyes It is preferable to employ a dye which is insoluble in water and the developing baths, to prevent staining of the emulsion or support.
  • the dyed wax layer When the dyed wax layer is applied directly to the film it may or may not be removed during development, depending upon the nature of the wax coating itself and upon the developer employed. Usually it will not be removed without special treatment. The small amount of wax remaining upon the support, even if the layer is removed, will, however, have a beneficial efiect in lubricating the film and causing it to run more easily through the various types of machines employed in motion picture work. In the case of motion pictures especially, of course, it will he usually desirable either to use a layer which is removed in the processing or to take special steps to remove it.
  • the layer is removed during development. This is accomplished largely by the penetration of the [,J developing baths at the edges of the film and through minute pores of the wax layer, causing the soluble layer, together with the wax layer over it to disintegrate.
  • the removal of the nonhalation element in this case does not necessarily consist of any bleaching of the dye nor the removal of the backing as a skin. In other words, the backing does not fioat away in coherent pieces butrather completely disintegrates.
  • the dyes employed need not be of the kind which are bleached or discolored during the processing.
  • a photographic film comprising a support, on one face of said mpport a sensitive emulsion layer, on the opposite face of said support a soluble layer containing a dye, and over the soluble layer another layer containing a wax as the primary constituent and a dye.
  • a photographic film comprising a support,
  • a sensitive emulsion layer on the opposite face of said supports. lay er soluble in alkali, and over the soluble layer another layer'containing a wax as the primary constituent and a dye.
  • a photographic film comprising a support, on one face of said support a sensitive emulsion layer, on the opposite face of said support a thin layer containing casein, and over the latter another layer containing wax as the primary con'.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US516046A 1931-02-16 1931-02-16 Nonhalation backing for photographic film Expired - Lifetime US1942852A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US516046A US1942852A (en) 1931-02-16 1931-02-16 Nonhalation backing for photographic film
DEK124262D DE653197C (de) 1931-02-16 1932-02-14 Verfahren zum Herstellen einer Lichthofschutzschicht fuer photographische Filme unter Verwendung einer gefaerbten Wachsschicht
GB4558/32A GB379984A (en) 1931-02-16 1932-02-16 Improvements in or relating to photographic films
FR731478D FR731478A (fr) 1931-02-16 1932-02-16 Perfectionnements aux couches dorsales anti-halo pour produits photographiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US516046A US1942852A (en) 1931-02-16 1931-02-16 Nonhalation backing for photographic film

Publications (1)

Publication Number Publication Date
US1942852A true US1942852A (en) 1934-01-09

Family

ID=24053899

Family Applications (1)

Application Number Title Priority Date Filing Date
US516046A Expired - Lifetime US1942852A (en) 1931-02-16 1931-02-16 Nonhalation backing for photographic film

Country Status (4)

Country Link
US (1) US1942852A (fr)
DE (1) DE653197C (fr)
FR (1) FR731478A (fr)
GB (1) GB379984A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462534A (en) * 1946-03-29 1949-02-22 Du Pont Light-sensitive photographic elements
US3631514A (en) * 1969-04-14 1971-12-28 Ilford Ltd Recording film having removable antistatic layer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753825C (de) * 1940-12-25 1952-10-20 Schallband Syndikat A G Verfahren zur Herstellung von Baendern fuer mechanische Schallaufnahmen
BE506949A (fr) * 1950-11-07
DE1027065B (de) * 1956-10-20 1958-03-27 Detag Lichtfilterverwendung fuer Aufsichts- und Durchsichtszwecke

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462534A (en) * 1946-03-29 1949-02-22 Du Pont Light-sensitive photographic elements
US3631514A (en) * 1969-04-14 1971-12-28 Ilford Ltd Recording film having removable antistatic layer

Also Published As

Publication number Publication date
FR731478A (fr) 1932-09-03
DE653197C (de) 1937-11-16
GB379984A (en) 1932-09-08

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