US2346078A - Antihalation protective layer - Google Patents
Antihalation protective layer Download PDFInfo
- Publication number
- US2346078A US2346078A US420088A US42008841A US2346078A US 2346078 A US2346078 A US 2346078A US 420088 A US420088 A US 420088A US 42008841 A US42008841 A US 42008841A US 2346078 A US2346078 A US 2346078A
- Authority
- US
- United States
- Prior art keywords
- antihalation
- layer
- cellulose
- protective layer
- 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
Links
Images
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 photographic antihalation film and more particularly to antihalation film carrying a protective layer for the anti halatlon layer.
- a superior method of overcoming this bleeding tendency of antihalation dyes which consists in overcoating the dye layer with a protective layer of cellulose organic acid ester permeable to photographic processing solutions. It is not always suflicient to coat such a layer from solvent solutions chosen at random, for in some instances with improper solvents, the dye may be carried into the back oi. the film support or may be redistributed into the protective layer itself.
- a solvent is chosen for coating the protective layer which has a minimum attack on the vehicle of the antihalation layer, and in which the light-absorbing material is not appreciably soluble.
- a film support l0 which may be a cellulose ester, synthetic resin or similar material, carries a sensitive emulsion layer II, on one side, or a multiplicity of difierently sensitized emulsions which may also be colored with dyes bleachable under influence of silver, and on the other side an antihalation layer ll, of cellulose organic acid ester, containing fugitive dyes, permeable to photographic processing solutions, and over which is the protective layer l3 of the invention, which may either be only permeable to, and not soluble in, photographic processing solutions, or it may be both permeable and soluble in said solutions.
- Example I A photographic film support of cellulose acetate propionate or cellulose nitrate suitably subbed if desired as shown in Examples 1 and 4 of Nadeau and Slack U. S. Patent 2,289,799, granted July 14, 1942, may be coated with a dope of the fol lowing typical composition.
- pure ethyl acetate, or the commercial grade indicated, containing some ethyl alcohol may be used to the extent that the dye layer is not adversely affected.
- the amount of a dye solvent, such as alcohol, which may be tolerated is dependent upon the dye density in the antihalation layer. Thus when the density is such that only antihalation protection is provided, an appreciable amount may be tolerated, however, if a greater density of dye is required, as for instance, to give adequate leader protection for daylight loading'of film, then the degree of activity of the solvent must be reduced. Generally, about 10-15% of active dye solvent may be tolerated.
- Example II The antihalation layer, of a film of the type described in Example I suitably subbed if desired and coated with cellulose acetate phthalate, may be tinted with a solution containing about parts of ethyl alcohol, 10 parts of water and about 1.5 parts of a fugitive dye such as Acid Magenta (800), Acid Green (764), Acid Blue 3R, Luxol Brilliant Green BL (guanidine salt of Acid Green) or sulfonated Malachite Green.
- the dye solution may contain a surface-active agent such as Aerosol AY (sodium suli'o diamyl succinate) in the amount of about 1-5 per cent.
- cellulose acetate phthalatein Over the dye layer is applied a 5 per cent solution of cellulose acetate phthalatein a mixture of 94 parts of ethylene chloride and 6 parts of alcohol.
- our invention may be applied to other suitable photographic fllm supports of materials such as synthetic resins, cellulose esters, as for instance, cellulose acetate, cellulose propionate, etc., celluose mixed organic acid esters, e. g., cellulose acetate propionate, cellulose acetate butyrate or cellulose nitrate.
- These supports may carry a suitable antihalation layer of a material preferably only permeable to photographic processing solutions, however, antihalation layers soluble in photographic processing solutions may be used if desired, in which case a light-absorbing material, such as carbon or a non-fugitive dye may be used.
- Antihalation layers of the preferred type comprise the cellulose organic acid dicarboxylic acid esters disclosed in Nadeau and Slack U. S. Patent 2,311,073, granted February 16, 1943, that is, cellulose esters containing substantially 4-8 acyl groups per C14 cellulose unit of which not more than one is a dicarboxylic acid acyl group and the remainder are monobasic acid groups.
- esters are permeable to, but not soluble in, photographic processing solutions such as a developer.
- the cellulose monobasic organic acid esters disclosed in the same patent application may be used.
- materials soluble in photographic processing solutions as for instance, the alkali soluble cellulose organic acid dicarboxylic acid esters disclosed in the Nadeau and Slack U. S.
- Patent 2,289,799, above cited may be employed.
- antihalation layers containing resin vehicles such as disclosed in the Nadeau and Slack U. S. Patent tains another cellulose organic acid dicarboxylic acid ester of difi'erent composition, or a partially hydrolyzed cellulose monobasic organic acid ester of the composition shown in the application cited immediately above.
- a solvent which will adhesively join the ester of the protective layer to the antihalation layer and at the same time will not adversely aflect the dye distribution in the antihalation layer. This is more difiicult than in the case where the two layers contain the same cellulose ester.
- cellulose esters useful in the protective layer are alkali soluble cellulose organic acid dicarboxylic acid esters such as those disclosed in U. S. Patent 2,289,799 above cited in which case non-fugitive dyes or carbon may also be used in th antihalation layer. It is, therefore, obvious that from the materials useful in the protective layer of our invention may be chosen cellulose esters only permeable to photographic processing solutions, or both permeable and soluble in said solutions.
- antihalation layer or protective layer coating solutions may be added surface-active agents to promote penetration of processing solutions.
- varicus amines such as dioctyl amine or toluidine, may be used to form'salts with the dyes and carrier materials to aid in the fixation of the dye in the antihalation layer.
- a light sensitive photographic film comprising a support carrying a silver halide emulsion layer on one side thereof, on the other side an 2,319,080, granted May 11, 1943, may be provided so antihalation layer of cellulose organic acid ester with the protective layers of the invention if suitable solvent solutions are used.
- Films provided with antihalation layers in this manner are now susceptible to application of the protective layer of the invention.
- Materials preferred for use in this layer are the cellulose organic acid dicarboxylic acid esters and the cellulose monobasic organic acid esters, such as those disclosed in Patent 2,311,073, above cited, having substantially 4-8 acyl groups per C24 cel lulose unit of which not more than one is a dicarboxylic acid acyl group and the remainder are monobasic acid acyl groups.
- a solvent solution for the cellulose ester which has a minimum of attack on the vehicle of the antihalation layer and in which the antihalation dye, or dyes, is insoluble or not appreciably soluble.
- a light sensitive photographic film comprising a support carrying a silver halide emulsion layer on one side thereof, on the other side an antihalation layer of cellulose organic acid ester permeable to, but not soluble in, photographic processing solutions, and over the antihalation layer a protective layer of cellulose organic acid dicarboxylic acid ester permeable to, but not soluble in, photographic processing solutions and coated from a solvent solution in which the lightabsorbing material of the antihalation layer is not appreciably soluble.
- a light sensitive photographic film comprising a, support carrying a silver halide emulsion tective layer contains cellulose organic acid dilayer on one side thereof, on the other side an carboxylic acid esters are. shown in the preceding examples.
- the antihalation layer and the protective layer contain antihalation layer of cellulose organic acid ester permeable to, but not soluble in, photographic processing solutions, and over the antihalation layer a.
- protective layer of cellulose organic acid different cellulose esters e. g., if either layer con- 16 d ar xy acid ester having substantial y 4-8 acyl groups per C24 cellulose unit of which not more than one is a dicarboxylic acid acyl group and the remainder are monobasic acid acyl groups coated from a solvent solution in which the light-absorbing material of the antihalation layer is not appreciably soluble.
- a light sensitive photographic film comprising a support carrying a silver halide emulsion layer on one side thereof, on the other side an antihalation layer of a cellulose organic acid dicarboxylic acid ester having 4-8 acyl groups per C24 cellulose unit of which not more than one is a dicarboxylic acid acyl group and the rest are monobasic acid acyl groups, and over the antihalation layer a protective layer of a cellulose organic acid dicarboxylic acid ester having 4-8 acyl groups per C24 cellulose unitof which not more than one is a dicarboxylic acid acyl group and the rest are monobasic acid acyl groups coated from a solvent solution in which the lightabsorbing material oi the antihalation layer is not appreciably soluble.
- a light sensitive photographic film comprising a support carrying a silver halide emulsion layer on one side thereof, on the other side an antihalation layer of a cellulose organic acid ester permeable to, but not soluble in, photographic processing solutions, and over the antihalation layer a protective layer of a cellulose organic acid dicarboxylic acid ester soluble in photographic developing solutions.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Laminated Bodies (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR956731D FR956731A (nl) | 1941-11-22 | ||
US420088A US2346078A (en) | 1941-11-22 | 1941-11-22 | Antihalation protective layer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US420088A US2346078A (en) | 1941-11-22 | 1941-11-22 | Antihalation protective layer |
Publications (1)
Publication Number | Publication Date |
---|---|
US2346078A true US2346078A (en) | 1944-04-04 |
Family
ID=23665030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US420088A Expired - Lifetime US2346078A (en) | 1941-11-22 | 1941-11-22 | Antihalation protective layer |
Country Status (2)
Country | Link |
---|---|
US (1) | US2346078A (nl) |
FR (1) | FR956731A (nl) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2694662A (en) * | 1950-06-10 | 1954-11-16 | Eastman Kodak Co | Opaque sheeting and method of making same |
US3262782A (en) * | 1961-02-08 | 1966-07-26 | Agfa Ag | Matted antihalation layer for photographic materials |
US3511660A (en) * | 1965-10-19 | 1970-05-12 | Eastman Kodak Co | Antihalation backing for photographic silver halide recording elements |
US4459352A (en) * | 1982-12-27 | 1984-07-10 | Eastman Kodak Company | Conductive coating composition and composite bases and elements containing same |
US20070102253A1 (en) * | 2001-10-01 | 2007-05-10 | Travel Caddy, Inc. D/B/A Travelon | Pet carrier with wheels |
-
0
- FR FR956731D patent/FR956731A/fr not_active Expired
-
1941
- 1941-11-22 US US420088A patent/US2346078A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2694662A (en) * | 1950-06-10 | 1954-11-16 | Eastman Kodak Co | Opaque sheeting and method of making same |
US3262782A (en) * | 1961-02-08 | 1966-07-26 | Agfa Ag | Matted antihalation layer for photographic materials |
US3511660A (en) * | 1965-10-19 | 1970-05-12 | Eastman Kodak Co | Antihalation backing for photographic silver halide recording elements |
US4459352A (en) * | 1982-12-27 | 1984-07-10 | Eastman Kodak Company | Conductive coating composition and composite bases and elements containing same |
US20070102253A1 (en) * | 2001-10-01 | 2007-05-10 | Travel Caddy, Inc. D/B/A Travelon | Pet carrier with wheels |
Also Published As
Publication number | Publication date |
---|---|
FR956731A (nl) | 1950-02-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2732305A (en) | Silver hal | |
US2271234A (en) | Colloidal carbon antihalation layer | |
US2118059A (en) | Antistatic photographic film | |
US2074647A (en) | Manufacture of foils and artificial products | |
US2266435A (en) | Photographic stripping film | |
US3072482A (en) | Subbed photographically sensitive film element | |
US2346078A (en) | Antihalation protective layer | |
US3295979A (en) | Friction reducing coatings for photographic elements | |
US4582784A (en) | Photographic light-sensitive element with backing layer | |
US3053661A (en) | Polyester film elements and subbing compositions therefor | |
US3850641A (en) | Antistatic light-sensitive photographic material | |
US3361565A (en) | Silver halide photographic element containing a polyanionic color former and a gelatin antiabrasion layer | |
US3775128A (en) | Silver halide emulsion containing a triazine as antifoggant | |
US3704154A (en) | Process for producing photographic materials | |
US1939171A (en) | Photographic film base and coating therefor | |
US2703284A (en) | Subbing photographic film | |
US2367665A (en) | Photographic stripping film | |
US2289799A (en) | Antihalation film | |
US3617286A (en) | Photographic light-sensitive material having a back layer | |
GB482633A (en) | Improvements in or relating to photographic light sensitive elements | |
US3549375A (en) | Antistatic photographic film | |
US2140648A (en) | Photographic stripping film | |
US2319080A (en) | Antihalation backing for photographic film | |
US3549369A (en) | Antistatic acylhydrazinium salt | |
US4705736A (en) | Thermal diazo composition |