US2558857A - Photographic developer element - Google Patents

Photographic developer element Download PDF

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Publication number
US2558857A
US2558857A US727381A US72738147A US2558857A US 2558857 A US2558857 A US 2558857A US 727381 A US727381 A US 727381A US 72738147 A US72738147 A US 72738147A US 2558857 A US2558857 A US 2558857A
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United States
Prior art keywords
liquid
layer
roll
water
winding
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
US727381A
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English (en)
Inventor
Edwin H Land
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Polaroid Corp
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Polaroid 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
Priority to FR965191D priority Critical patent/FR965191A/fr
Application filed by Polaroid Corp filed Critical Polaroid Corp
Priority to US727381A priority patent/US2558857A/en
Priority to GB1972/48A priority patent/GB680423A/en
Application granted granted Critical
Publication of US2558857A publication Critical patent/US2558857A/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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/42—Structural details

Definitions

  • This application relates to photography and more particularly to novel photographic materials.
  • a principal object of the present invention is to provide a novel composit sheet material for use in photography which, when contacted with a layer of photosensitive material, is capable of developing a latent image in said photosensitive material and producing a positive image of said latent image on the surface of said sheet material.
  • Another object of the present invention is to provide a novel sheet material of the above type containing a layer of viscous liquid composition coated upon a layer of a material which is substantially impervious to oxygen and water vapor or has been so treated as to increase its impermeability, and said sheetlike material is capable of being formed into a substantially water vapor and oxygen impervious package such as a roll.
  • Another object of the present invention is to provide, for use in a composite sheet material of the type mentioned above, a layer of a viscous liquid composition having such dimensional stability as to be capable of completely maintaining its filmlike characteristics under conditions of use and containing a sufficient quantity of water to maintain the reactive portions of said liquid composition in solution.
  • Figure 1 is a somewhat diagrammatic, transverse sectional view of one type of sheet material comprehended by the present invention
  • Fig. 2 is a diagrammatic, sectional view of the novel sheet material of Fig. 1 in contact with a photosensitive layer to show a preferred use of the present invention
  • Fig. 3 is a diagrammatic sectional view of a package containing the novel composite sheet material of Fig. l in a roll form;
  • Fig. 4 is a plan view of a portion of the novel composite sheet material showing another modification of the invention.
  • the invention relates to a novel sheet material having thereon a very viscous coating comprising a liquid composition including a developer and a silver halide solvent, which, when contacted with an exposed photosensitive layer, is capable of developing a latent image in said photosensitive layer and forming a silver positive image of said latent image in said liquid coating.
  • the liquid composition has such viscosity as to form a ,very stable coating having the physical 20 carrying layer.
  • the viscosity of the material is also so high as to have an increased impermeability to oxygen.
  • novel liquid composition and the novel composite sheet material formed therewith are particularly adaptable for use in a one-step photographic process wherein a positive image of a subject image is obtained from a latent negative in a photosensitive layer within a camera.
  • This novel material may be readily rolled into an oxygen and water vapor impervious package from which it can be uncoiled so as to be placed in contact with an exposed photosensitive layer.
  • a layer H] of material such as paper which is hereinafter referred to as an image-
  • This image-carrying layer in a preferred embodiment, is formed of a sheet of paper known in the art as baryta paper.
  • an oxygen and water vapor impervious coating 14 such as a wax, a plastic, or a metal foil, such as lead or tin foil, or a combination of several of such materials.
  • a preferred oxygen and water vapor impervious backing 14 for the image-carrying layer I0 is formed by contacting the back side of the layer ill with a bath of melted "Product 2305, by American Cyanamide and Chemical Corp. under the designation Ozakerite yellow wax, by Quaker State under the designation White 5A Wax 160/ 1'70, by the Boreco Oil Co. under the designation Be Square Special 170/175 White.
  • This liquid composition l2 has a sufiicient quantity of water therein so that the various elements, particularly the developer, etc., are in solution. Some of the film-forming material may be in solution. The important point is that there is enough water in the liquid composition to carry the reactive elements, such as the developer and the silver halide solvent, in solution so as to impart to the liquid composition the chemical characteristics of a solution.
  • the viscous liquid composition l2 may be formed as set forth in the following nonlimiting examples:
  • Example 1 are added in dry form: 14.9 grams of citric acid, H
  • Example 2 The following ingredients are mixed in a mechanical mixer in a manner'similar to that described in Example 1:
  • Such liquid compositions are extremely viscous, having. the consistency of a very thick jelly.
  • the liquid composition may be coated on the image-carrying layer II] by means of usual coating techniques such as by the use of pressure coating rolls. It is preferred that this coating operation be carried out in an inert atmosphere so as tov prevent oxidation of the developer in the liquid composition. It is possible, however, to form this coating without special precautions in view of the fact that the material is so viscons that oxygen seems to be incapable of permeating it, and whatever oxidation does occur is primarily a very slight surface oxidation. However, the sheet material should be coiled upon itself immediately after coating and formed into an oxygen and water vapor impervious roll.
  • edges of the roll When such a roll is formed, the only places where oxygen can enter, or water vapor escape, are the edges of the roll. These edges are preferably sealed such as by having a coating of wax or other oxygen and water vapor impervious material applied thereto. A portion of the leading end of the image-carrying layer ill may be left uncoated so that this uncoated portion may act as a leader for positioning the sheet material in a camera.
  • the package When the package is mounted in a camera it is positioned preferably so that the coating 52 is contacted with the photosensitive emulsion of an exposed photosensitive film. These two surfaces are preferably brought into intimate relationship by the application of pressure thereto. In Fig. 2 this step of the photographic process is shown diagrammatically.
  • the image-carrying layer I 0 having on its surface a layer of liquid composition 52 and having on its back the oxygen and water vapor impervious coating M.
  • This composite sheet material has been brought into contact with a layer of photosensitive material Ill carried by a usual cellulosic film base 16.
  • Composite sheet material l9, l2, I4 is pressed in contact with the photographic film IS, It by means of a pair of pressure rollers 24. It is not essential to apply this pressure but it is desirable since it assures intimate contact between the surface of the layer of liquid composition and the photosensitive emulsion l8.
  • the final image is apt to be imperfect, since any spaces between the surface of the layer l2 and the surface of the layer it prevent the passage of the developer, and the other materials in solution, from the liquid layer i 2 to the photosensitive layer 58.
  • the liquid composition permeates the photosensitive emulsion l8 and the developer therein develops the latent image.
  • the silver halide solvent concurrently therewith, forms soluble silver complexes with the undeveloped silver halide and transfers these soluble silver complexes to layer l2 where they are converted to an image comprising silver by the developer remaining in the layer 52. There is thus produced in the liquid layer a positive image of the latent negative image.
  • This layer is considerably dried out by contacting the photosensitive layer, since the gelatin of the photosensitive emulsion acts to absorb a considerable amount of the water from the liquid composition, the film-forming material dissolved in the liquid composition precipitates from the liquid composition and forms a dimensionally stable film containing the positive image.
  • the novel sheet material, having thereon the layer of film-forming material is separated from the photosensitive layer after a time of one or two minutes, the remainder of the water in the liquid composition evaporates and the film becomes completely dry.
  • the layer E2 of the liquid composition should have such dimensional stability that the thickness of the film in any particular portion thereof will remain constant during the normal usage of the film. Also, it should not spread when placed under a considerable pressure in the neighborhood of several pounds per square inch. It is also preferable that the film be only slowly permeable to oxygen so that very little oxidation of the developer contained therein will occur in the time between the transfer of the sheet assembly from an oxygen impervious assembly, such as a roll thereof, to intimate contact with the photosensitive layer 18.
  • the film of liquid composition must also be permeable to water so as to permit the transfer of the water solution of the developer and other materials from the film E2 to the photosensitive layer ii! for reaction therewith. It has been found that a liquid composition prepared in the manner discussed above and having a viscosity such that it will not cold flow under normal temperature conditions exhibits these desirable characteristics.
  • One of the principal advantages of the use of a composite sheet material of the type described above is that it permits a very accurate determination of the amount of developer and other materials which are available for reaction with any particular portion of the photosensitive layer I8. It is thus possible to control the amount of developer so that the amount of developer available for reaction with any unit area of the photosensitive layer l8 is just suihcient to completely react with a fully developable unit area of photo sensitive layer I8.
  • the quantities of materials available may be very closely controlled in the manufacture of the sheet material and it is not necessary to resort to careful controls in the camera for accomplishing the desired spreading of the liquid composition in the optimum film thickness.
  • Fig. 3 there is shown a preferred method of storing such a sheet assembly in an oxygen and water Vapor impervious package. As shown in this figure, one end of a strip of the sheet assembly of Fig. 1 is attached to the spindle 32 of a roll of the type well known in photography. The assembly is then wound on this spool, building up a number of layers of the assembly on top of each other.
  • Fig. 3 it may be desirable to dispense with the edge coating of the type shown in Fig. 3 at 30, in which case suitable oxygen and water vapor impervious strips may be formed on the marginal portions of one or both surfaces of the image-carrying layer while it is in a sheetlike condition so that, when it is rolled upon itself, these strips edge seal the image-carrying layer to the back of the precedin y r.
  • the usual image-carrying layer I! which has a backing (not shown) of a water vapor and oxygen impervious material.
  • a strip 48 of a sealing material which may be, in a preferred modification, a plastic adhesive, such as ethyl cellulose, a polyvinyl acetal known by the trade name Alvar, the polyvinyl butyral identified as Butvar, and the polyvinyl formal identified as Formvar.
  • a plastic adhesive such as ethyl cellulose, a polyvinyl acetal known by the trade name Alvar, the polyvinyl butyral identified as Butvar, and the polyvinyl formal identified as Formvar.
  • the strip 40 may be desirable to extend the strip 40 completely around the edge of the imagecarrying layer [0 and onto the back surface thereof so as to form a complete seal around the edge of the assembly, thus preventing oxygen from entering the package through the edge of the image-carrying layer It
  • This modification of the invention is desirable in those cases where the image-carrying layer I0 is formed of a relatively permeable material such as paper.
  • the backing for the image-carrying layer may be extended around the edge and brought to the front of the image-carrying layer.
  • a further seal may be applied to the package, such as by dipping the sealed package into a bath of melted wax.
  • baryta paper which has been described as the preferred image-carrying layer ID
  • numerous other materials may be used such as other papers, cellulosic films, gelatin, polyhydroxy alkanes, such as polyvinyl alcohol, sodium alginate, cellulose ethers, such as methyl cellulose or their derivatives, such as sodium carboxymethyl cellulose or hydroxyethyl cellulose, cellulosic esters, such as cellulose acetate, cellulose nitrate, cellulose acetate propionate or cellulose acetate butyrate.
  • the image-carrying layer is preferably treated mechanically or chemically so as to increase the adhesion between the image-carrying layer and the layer of the liquid composition.
  • the liquid composition should tend to adhere to the image-carrying layer I 8 more readily than it adheres to the back thereof or to any protective backing which has been applied to the image-carrying layer.
  • the film-forming material may be sodium alginate, hydroxyethyl cellulose, starch, gums or other materials, or mixtures thereof where such materials are capable ofv maintaining their viscosity over long periods of time at the alkalinity ofthe solution.
  • the film-forming material may include an inert pigment material such as titanium dioxide so as to make said layer of liquid composition white and opaque. This latter modification is referred in those cases where the image-carrying layer l0, and any protective backing applied thereto, are transparent, since the white opaque characteristic of the liquid composition enables it to form a background for the positive image created in terms of black silver.
  • This white pigment may, in one preferred form of the invention, comprise zinc sulfide particles which have the ability of having their surface cations replaced by silver, from a silver complex, thereby converting the particles to black silverplated particles.
  • the sodium hydroxide may be omitted from the liquid and the liquid coated over a sub-layer of a sub stance of acid reaction, such as an acid, or acid salt.
  • a subcoat is preferably a polymeric acid such as cellulose acetate hydrogen phthalate or carboxymethyl cellulose, these polymers being relatively insoluble at a low pH.
  • the alkali is preferably associated with the photosensitive layer so as to be dissolved as the liquid permeates this latter layer.
  • This last modification of the invention permits the storage of the liquid at a low pH, the development of the negative and positive images at a high pH, and the subsequent neutralization of the alkali for preventing staining due to excess developer.
  • a metal salt which forms a relatively insoluble metal hydroxide, such as lead acetate or zinc nitrate, is preferred.
  • an elongated flexible composite sheet wound into a roll so that the inner surface of each winding engages the outer surface of the preceding winding
  • said flexible composite sheet comprising an elongated supporting strip which is the outer layer of each winding of the roll and which has adhered to the inner surface thereof a liquid-containing layer of the consistency of very thick jelly, said supporting strip having between the inner and outer surfaces thereof a stratum substantially impervious to water and to water vapor, which stratum prevents depthwise diffusion of the liquid of said liquid-containing layer outwardly of said roll, and liquid-confining means cooperating with the edges of said composite sheet for producing a liquid-tight seal at each end of said roll which prevents edgewise escape of the liquid of the liquid-containing layer, the outer surface of said supporting strip having very little affinity for the said liquid-containing layer so that each winding is strippable from the next succeeding winding of
  • liquidconfining means comprise a material impervious to water and water vapor coated on each end surface of the roll.
  • liquidconfining means comprise a pair of sealing strips of a water-inipervious material mounted on the inner surface of the supporting strip and extending lengthwise thereof, adjacent the marginal edge portions thereof, on opposite sides of said liquidcontaining layer.
  • an elongated flexible composite sheet wound into a roll so that the inner surface of each winding engages the outer surface of the preceding winding said flexible composite sheet comprising an elongated supporting strip which is the outer layer of each winding of the roll and which has adhered to the inner surface thereof a liquid-containing layer of the consistency of very thick jelly, said supporting strip comprising a layer of paper impregnated with microcrystalline wax, said microcrystalline wax providing a stratum substantially impervious to water and to water vapor and preventing outward diffusion of the liquid of the liquid-containing layer of each winding of said roll, the liquidconfining means cooperating with the edges of said composite sheet for producing a liquid-tight seal at each end of said roll which prevents edgewise escape of the liquid of the liquid-containing layer, the outer surface of said supporting strip having very little afiinity for the said liquidcontaining layer so that each

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US727381A 1947-02-08 1947-02-08 Photographic developer element Expired - Lifetime US2558857A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR965191D FR965191A (en(2012)) 1947-02-08
US727381A US2558857A (en) 1947-02-08 1947-02-08 Photographic developer element
GB1972/48A GB680423A (en) 1947-02-08 1948-01-22 Improvements in or relating to photographic developing materials and methods

Applications Claiming Priority (1)

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US727381A US2558857A (en) 1947-02-08 1947-02-08 Photographic developer element

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FR (1) FR965191A (en(2012))
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090517B (de) * 1959-01-07 1960-10-06 Wilson Samuel Kao Mehrschichtenrollfilm zur Herstellung direkter Positive nach dem Silbersalzdiffusionsverfahren
US3165408A (en) * 1960-12-07 1965-01-12 Polaroid Corp Photographic products
US3181458A (en) * 1961-02-16 1965-05-04 Anken Chemical & Film Corp Transfer process for producing stencils
US3260598A (en) * 1961-05-29 1966-07-12 Eastman Kodak Co Photographic element-developer system
DE1240401B (de) * 1956-10-09 1967-05-11 Polaroid Corp Verfahren zum gleichzeitigen Entwickeln bzw. Farbentwickeln von mindestens zwei belichteten lichtempfindlichen Schichten
US3326712A (en) * 1964-01-20 1967-06-20 Mead Corp Transfer print receiving paper and method of producing same
US3351470A (en) * 1963-07-25 1967-11-07 Polaroid Corp Novel photographic products, processes and compositions
US3368896A (en) * 1962-07-28 1968-02-13 Afga Ag Image-receiving material for the production of photographic images by the silver salt diffusion process
US3385701A (en) * 1964-11-09 1968-05-28 Dick Co Ab Lithographic offset master and method
US3410685A (en) * 1962-05-09 1968-11-12 Agfa Ag Direct-positive images by the silver salt diffusion process
US3498788A (en) * 1966-07-05 1970-03-03 Polaroid Corp Novel laminations for identification cards
US4435062A (en) 1982-12-27 1984-03-06 Polaroid Corporation Film processing apparatus
US4443530A (en) * 1982-10-22 1984-04-17 Polaroid Corporation Self-processing film unit with liquid applicator
US4523825A (en) * 1984-06-14 1985-06-18 Polaroid Corporation Film processing apparatus and system
US4605608A (en) * 1985-09-23 1986-08-12 Polaroid Corporation Image-receiving element with crosslinked hydrophilic polymer containing processing composition
US5970271A (en) * 1997-03-11 1999-10-19 Polaroid Corporation Spool caddy for use with dry optical image processing of roll film
US5993080A (en) * 1997-03-11 1999-11-30 Polaroid Corporation System for optical dry processing of spooled photographic film
US6296993B1 (en) 2000-06-13 2001-10-02 Eastman Kodak Company Method of providing digitized photographic image
US6309810B1 (en) 2000-06-13 2001-10-30 Eastman Kodak Company Photochemical delivery article and method of use
US6361225B1 (en) 2000-06-13 2002-03-26 Eastman Kodak Company Apparatus for providing a photochemical reaction

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE121593C (en(2012)) *
DE43521C (de) * Dr. L. BACKELAN DT in Gent, Belgien Photographische Trockenplatten, welche durch Eintauchen in Wasser entwickelt werden
GB189917738A (en) * 1899-09-02 1900-06-02 John Edward Thornton Improvements in Sensitized Papers, Cards, and other Materials Used for the Production of Photographic Prints from Negatives.
GB190609248A (en) * 1906-04-19 1907-04-18 James Dennis Roots Improvements in Pneumatic Tyres.
US1207042A (en) * 1913-10-07 1916-12-05 H P Patents And Processes Company Inc Composition of matter for developing and fixing photographic exposures.
US1261748A (en) * 1918-01-18 1918-04-02 Arthur W Mccurdy Photographic-film cartridge or pack.
CH115331A (de) * 1924-05-27 1926-06-16 P Westermann Albert Verfahren zur Herstellung von Präparaten für die Photographie.
FR635715A (fr) * 1927-06-09 1928-03-23 Tot Exploitatie Van Van Den Bo Cartouche photographique
FR662060A (fr) * 1927-10-15 1929-08-02 Perfectionnement apporté dans les procédés de traitement chimique des épreuves photographiques positives ou négatives
US1911955A (en) * 1927-09-24 1933-05-30 Heinecke William Phototransfer process
AT141872B (de) * 1933-06-17 1935-05-25 Max V Dr Rigler Verfahren zur Entwicklung photographischer Schichten.
US2221873A (en) * 1937-03-16 1940-11-19 Gen Aniline & Film Corp Production of mat light-sensitive photographic paper
US2312854A (en) * 1940-07-20 1943-03-02 Toland William Craig Light-sensitive element
FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2360216A (en) * 1943-06-08 1944-10-10 Eastman Kodak Co Subbing photographic paper supports

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE43521C (de) * Dr. L. BACKELAN DT in Gent, Belgien Photographische Trockenplatten, welche durch Eintauchen in Wasser entwickelt werden
DE121593C (en(2012)) *
GB189917738A (en) * 1899-09-02 1900-06-02 John Edward Thornton Improvements in Sensitized Papers, Cards, and other Materials Used for the Production of Photographic Prints from Negatives.
GB190609248A (en) * 1906-04-19 1907-04-18 James Dennis Roots Improvements in Pneumatic Tyres.
US1207042A (en) * 1913-10-07 1916-12-05 H P Patents And Processes Company Inc Composition of matter for developing and fixing photographic exposures.
US1261748A (en) * 1918-01-18 1918-04-02 Arthur W Mccurdy Photographic-film cartridge or pack.
CH115331A (de) * 1924-05-27 1926-06-16 P Westermann Albert Verfahren zur Herstellung von Präparaten für die Photographie.
FR635715A (fr) * 1927-06-09 1928-03-23 Tot Exploitatie Van Van Den Bo Cartouche photographique
US1911955A (en) * 1927-09-24 1933-05-30 Heinecke William Phototransfer process
FR662060A (fr) * 1927-10-15 1929-08-02 Perfectionnement apporté dans les procédés de traitement chimique des épreuves photographiques positives ou négatives
AT141872B (de) * 1933-06-17 1935-05-25 Max V Dr Rigler Verfahren zur Entwicklung photographischer Schichten.
US2221873A (en) * 1937-03-16 1940-11-19 Gen Aniline & Film Corp Production of mat light-sensitive photographic paper
US2312854A (en) * 1940-07-20 1943-03-02 Toland William Craig Light-sensitive element
FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2360216A (en) * 1943-06-08 1944-10-10 Eastman Kodak Co Subbing photographic paper supports

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240401B (de) * 1956-10-09 1967-05-11 Polaroid Corp Verfahren zum gleichzeitigen Entwickeln bzw. Farbentwickeln von mindestens zwei belichteten lichtempfindlichen Schichten
DE1090517B (de) * 1959-01-07 1960-10-06 Wilson Samuel Kao Mehrschichtenrollfilm zur Herstellung direkter Positive nach dem Silbersalzdiffusionsverfahren
US3165408A (en) * 1960-12-07 1965-01-12 Polaroid Corp Photographic products
US3181458A (en) * 1961-02-16 1965-05-04 Anken Chemical & Film Corp Transfer process for producing stencils
US3260598A (en) * 1961-05-29 1966-07-12 Eastman Kodak Co Photographic element-developer system
US3410685A (en) * 1962-05-09 1968-11-12 Agfa Ag Direct-positive images by the silver salt diffusion process
US3368896A (en) * 1962-07-28 1968-02-13 Afga Ag Image-receiving material for the production of photographic images by the silver salt diffusion process
US3351470A (en) * 1963-07-25 1967-11-07 Polaroid Corp Novel photographic products, processes and compositions
US3326712A (en) * 1964-01-20 1967-06-20 Mead Corp Transfer print receiving paper and method of producing same
US3385701A (en) * 1964-11-09 1968-05-28 Dick Co Ab Lithographic offset master and method
US3498788A (en) * 1966-07-05 1970-03-03 Polaroid Corp Novel laminations for identification cards
US4443530A (en) * 1982-10-22 1984-04-17 Polaroid Corporation Self-processing film unit with liquid applicator
US4435062A (en) 1982-12-27 1984-03-06 Polaroid Corporation Film processing apparatus
US4523825A (en) * 1984-06-14 1985-06-18 Polaroid Corporation Film processing apparatus and system
US4605608A (en) * 1985-09-23 1986-08-12 Polaroid Corporation Image-receiving element with crosslinked hydrophilic polymer containing processing composition
US5970271A (en) * 1997-03-11 1999-10-19 Polaroid Corporation Spool caddy for use with dry optical image processing of roll film
US5993080A (en) * 1997-03-11 1999-11-30 Polaroid Corporation System for optical dry processing of spooled photographic film
US6000863A (en) * 1997-03-11 1999-12-14 Polaroid Corporation Photographic processing method
US6296993B1 (en) 2000-06-13 2001-10-02 Eastman Kodak Company Method of providing digitized photographic image
US6309810B1 (en) 2000-06-13 2001-10-30 Eastman Kodak Company Photochemical delivery article and method of use
US6361225B1 (en) 2000-06-13 2002-03-26 Eastman Kodak Company Apparatus for providing a photochemical reaction

Also Published As

Publication number Publication date
GB680423A (en) 1952-10-08
FR965191A (en(2012)) 1950-09-05

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