US786534A - Transparent-paper stripping-film for photographs. - Google Patents
Transparent-paper stripping-film for photographs. Download PDFInfo
- Publication number
- US786534A US786534A US754200A US1900007542A US786534A US 786534 A US786534 A US 786534A US 754200 A US754200 A US 754200A US 1900007542 A US1900007542 A US 1900007542A US 786534 A US786534 A US 786534A
- Authority
- US
- United States
- Prior art keywords
- film
- transparent
- paper
- stripping
- photographs
- 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
- G03C1/805—Photosensitive materials characterised by the base or auxiliary layers characterised by stripping layers or stripping means
Definitions
- the object of this invention is to provide a new or improved transparent film for photographic purposes, whereby a transparent-paper base is combined with a removable orstripable film during manufacture and may remain so combined, if desired, throughout the various stages or operations of development-fixing, washing, drying, and varnishingand yet may be removed or separated from each other afterward or at any desired time.
- Our invention consists, essentially, in constructing or building up a stripping-film upon a transparent-paper base,whereby a perfectly new and improved technical result is obtained and a photographic film produced which is a great practical advance upon any hitherto known, as it combines all the advantages of a stripping-film, with the additional one of enabling the operator to judge the density of the negative almost as easily as with a transparent-glass plate or celluloid film.
- Figure 1 shows a stripping-film comprised of three layers
- Fig. 2 shows a stripping-film comprised of four layers.
- transparant paper A produced or prepared in any of the ways now well known in the art, such as by treating paper with oil, varnish, gum, or other like substances.
- the paper is then rolled and glazed before use.
- the transparent paper forming the base of the film is next coated with a transparent stripping medium or substance B, which will render the film, formed of gelatin C and sensitive emulsion C, capable of being stripped or removed after the picture has been obtained thereon.
- the transparent stripping medium B may be one of the following or other suitable substances: (a) a compound or substance prepared by dissolving the aluminium or zinc salts of fatty or resin acids (or a mixture of these salts) with a light hydrocarbon solvent, such as benzene or coal-tar naphtha, and then solidifying by drying; (7)) rubber solution; (0) solution of rubber followed by collodion; (d) solution of shellac or hard resinous varnish; (a) a cement soluble in water or other solvents, such as soluble gelatin.
- a compound or substance prepared by dissolving the aluminium or zinc salts of fatty or resin acids (or a mixture of these salts) with a light hydrocarbon solvent, such as benzene or coal-tar naphtha, and then solidifying by drying (7)) rubber solution; (0) solution of rubber followed by collodion; (d) solution of shellac or hard resinous varnish; (a) a cement soluble in water or other solvents, such as soluble
- the sensitive film C should adhere to the transparentpaper base A during all the operations until finallydried and that it should then or at any subsequent time be easily removable, and this we fully attain by the use as a stripping medium of the substance prepared by dissolving the aluminium or zinc sals of a fatty or resin acid, then solidifying the same.
- the transparent paper A for the base when coated or treated with this material is rolled or calendered until the surface is perfectly smooth and free is thin, light, and strong.
- the object of the smooth surface is to leave the film C on removal from the transparent-paper base A with the highest possible degree of transparency and freedom from grain-markings.
- the film C itself is built up on the transparent-paper base A on top of the stripping medium B by coating the same with insoluble gelatin, celluloid, or similar substances and finally coating the same with the sensitiveemulsion O to the required degree.
- a film formed upon such a prepared transparent-paper base A can be removed therefrom with the greatest ease by simply pulling the film C and paper apart with the lingers, no heat nor solvents being necessary. Moreover, the film never comes ofi' without being pulled and never fails to come off when desired.
- a film prepared as described has the following advantages over those hitherto known: It It is sufliciently transparent to enable density to be easily and correctly judged in the dark room. It does not cockle before, during, or after development and can be dried flat. The film itself can be easily and with certainty stripped from the temporary backing.
- Transparent-paper films manufactured in the way described may be employed for various purposes such as for rapid or slow gelatino-bromid emulsion for development, gelatino-chlorid emulsion for printing out or fordevclopment, also for negatives, cinematograph-positives, lantern or Window transparencies, and other purposes.
- a transparent stripping-film for photographic cameras comprising in its construction a transparent smooth paper base, a layer of a transparent stripping medi um coated upon the paper, a layer of transparent insoluble material coated upon the stripping medium, and a layer of transparent sensitive emulsion coat ed over the stripping medium, substantially as described.
- a photographic stripping-film comprising in its construction, a base of transparent paper, a stripping medium of a salt of fatty and resin acid dissolved and dried, and a layer of sensitive emulsion, substantially as described.
- a photographic stripping-film comprising in its construction, a base of transparent paper, a stripping medium of an aluminium salt of a fatty and resin acid, a strengthening layer of insoluble gelatin, and a coating of sensitive emulsion, substantially as described.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Color Printing (AREA)
Description
No. 786,584; PATENTED APR. 4, 1905.
J. B.- THORNTON & G. F. S. ROTHWELL.
TRANSPARENT'PAPER STRIPPING FILM FOR PHOTOGRAPHS.
' APPLIOATION FILED MAR. 6, 1900.
WITNESSES.
UNITED STATES Patented April 4, 1905.
PATENT OEEIcE.
JOHN E. THORNTON AND CHARLES F. S. ROTHWELL, OF MANCHESTER, ENGLAND, ASSIGNORS TO JOHN OWDEN OBRTEN, OF MANCHESTER,
ENGLAND.
TRANSPARENT-PAPER STRlPPlNG-FILIVI FOR PHOTOGRAPHS.
SPECIFICATION forming part of Letters Patent NO. 786,534, dated April 4, 1905.
Application filed March 6, 1900- Serial No. 7,542.
To all whom it may concern.-
Be it known that we, JOHN EDWARD THORN- TON and CHARLES FREDERICK SEYMOUR ROTH- wELL, subjects of the Queen of Great Britain, and residents of Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Transparent-Paper Stripping-Films forPhotogra phs,of which the following is a specification.
The object of this invention is to provide a new or improved transparent film for photographic purposes, whereby a transparent-paper base is combined with a removable orstripable film during manufacture and may remain so combined, if desired, throughout the various stages or operations of development-fixing, washing, drying, and varnishingand yet may be removed or separated from each other afterward or at any desired time.
We are well aware that photographic films have been made with transparent paper as a base; but in every such instance it has been unremovable and remains a permanent part of such film; but it is very objectionable, as on all prints or pictures obtained from negatives on such films the grain of the paper has been reproduced and been more or less visible in the print, and the presence of the paper in the finished film has also increased the time necessary to obtain prints from such negatives. V e are also well aware that many stripping-films have been used; but in every case the film has been prepared or built up on a backing of strong thick white and comparatively opaque paper, which on account of its opacity renders it very difficult for the operator to judge the density of the negative or picture when developing by the feeble red light of the dark room.
Our invention consists, essentially, in constructing or building up a stripping-film upon a transparent-paper base,whereby a perfectly new and improved technical result is obtained and a photographic film produced which is a great practical advance upon any hitherto known, as it combines all the advantages of a stripping-film, with the additional one of enabling the operator to judge the density of the negative almost as easily as with a transparent-glass plate or celluloid film.
The drawings show a perspective of the film. Figure 1 shows a stripping-film comprised of three layers, and Fig. 2 shows a stripping-film comprised of four layers.
In carrying out the invention we take a transparant paper A, produced or prepared in any of the ways now well known in the art, such as by treating paper with oil, varnish, gum, or other like substances. The paper is then rolled and glazed before use. The transparent paper forming the base of the film is next coated with a transparent stripping medium or substance B, which will render the film, formed of gelatin C and sensitive emulsion C, capable of being stripped or removed after the picture has been obtained thereon.
The transparent stripping medium B may be one of the following or other suitable substances: (a) a compound or substance prepared by dissolving the aluminium or zinc salts of fatty or resin acids (or a mixture of these salts) with a light hydrocarbon solvent, such as benzene or coal-tar naphtha, and then solidifying by drying; (7)) rubber solution; (0) solution of rubber followed by collodion; (d) solution of shellac or hard resinous varnish; (a) a cement soluble in water or other solvents, such as soluble gelatin. We prefer to employ the first-named substance as the stripping medium. as this we find gives much the best technical-results.
A point of great importance is that the sensitive film C should adhere to the transparentpaper base A during all the operations until finallydried and that it should then or at any subsequent time be easily removable, and this we fully attain by the use as a stripping medium of the substance prepared by dissolving the aluminium or zinc sals of a fatty or resin acid, then solidifying the same. We prefer to use the aluminium salts of palmitic, oleic,
stearic, or resin acids. The transparent paper A for the base when coated or treated with this material is rolled or calendered until the surface is perfectly smooth and free is thin, light, and strong.
from grain. The object of the smooth surface is to leave the film C on removal from the transparent-paper base A with the highest possible degree of transparency and freedom from grain-markings. The film C itself is built up on the transparent-paper base A on top of the stripping medium B by coating the same with insoluble gelatin, celluloid, or similar substances and finally coating the same with the sensitiveemulsion O to the required degree. A film formed upon such a prepared transparent-paper base A can be removed therefrom with the greatest ease by simply pulling the film C and paper apart with the lingers, no heat nor solvents being necessary. Moreover, the film never comes ofi' without being pulled and never fails to come off when desired.
A film prepared as described has the following advantages over those hitherto known: It It is sufliciently transparent to enable density to be easily and correctly judged in the dark room. It does not cockle before, during, or after development and can be dried flat. The film itself can be easily and with certainty stripped from the temporary backing.
Transparent-paper films manufactured in the way described may be employed for various purposessuch as for rapid or slow gelatino-bromid emulsion for development, gelatino-chlorid emulsion for printing out or fordevclopment, also for negatives, cinematograph-positives, lantern or Window transparencies, and other purposes.
What we claim as our invention,and desire to protect by Letters Patent, is
1. A transparent stripping-film for photographic cameras comprising in its construction a transparent smooth paper base, a layer of a transparent stripping medi um coated upon the paper, a layer of transparent insoluble material coated upon the stripping medium, and a layer of transparent sensitive emulsion coat ed over the stripping medium, substantially as described.
2. A photographic stripping-film comprising in its construction, a base of transparent paper, a stripping medium of a salt of fatty and resin acid dissolved and dried, and a layer of sensitive emulsion, substantially as described.
3. A photographic stripping-film comprising in its construction, a base of transparent paper, a stripping medium of an aluminium salt of a fatty and resin acid, a strengthening layer of insoluble gelatin, and a coating of sensitive emulsion, substantially as described.
In witness whereof we have hereunto signed our names in the presence of tWo subscribing witnesses.
J. E. THORNTON. C. F. S. ROTHWVELL. Witnesses:
J. OWDEN OBRIEN, HARRY BARNFATHER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US754200A US786534A (en) | 1900-03-06 | 1900-03-06 | Transparent-paper stripping-film for photographs. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US754200A US786534A (en) | 1900-03-06 | 1900-03-06 | Transparent-paper stripping-film for photographs. |
Publications (1)
Publication Number | Publication Date |
---|---|
US786534A true US786534A (en) | 1905-04-04 |
Family
ID=2855025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US754200A Expired - Lifetime US786534A (en) | 1900-03-06 | 1900-03-06 | Transparent-paper stripping-film for photographs. |
Country Status (1)
Country | Link |
---|---|
US (1) | US786534A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2543181A (en) * | 1947-01-15 | 1951-02-27 | Polaroid Corp | Photographic product comprising a rupturable container carrying a photographic processing liquid |
US20040129310A1 (en) * | 2002-12-19 | 2004-07-08 | Pierre Delobel | Valve wtih integrated actuator |
-
1900
- 1900-03-06 US US754200A patent/US786534A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2543181A (en) * | 1947-01-15 | 1951-02-27 | Polaroid Corp | Photographic product comprising a rupturable container carrying a photographic processing liquid |
US20040129310A1 (en) * | 2002-12-19 | 2004-07-08 | Pierre Delobel | Valve wtih integrated actuator |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2341877A (en) | Sublayers for film elements and preparation thereof | |
US3359107A (en) | Photographic element | |
US3072483A (en) | Photographic element comprising polyethylene terephthalate film base | |
US786534A (en) | Transparent-paper stripping-film for photographs. | |
DE2340322A1 (en) | RECORDING MEDIUM FOR PHASE HOLOGRAMS | |
US3861942A (en) | Process for making flat photographic film product | |
US670118A (en) | Photographic stripping-film. | |
US2578282A (en) | Protective layer for finished photographic film | |
DE827899C (en) | Carrier for photographic layers for color photography | |
US861472A (en) | Photographic film. | |
US679501A (en) | Photographic process and product. | |
US2100224A (en) | Color photography | |
US778947A (en) | Carbon transfer-paper. | |
US347527A (en) | Process of preparing paper for sun-pictures | |
US610861A (en) | Photographic pellicle and process of producing same | |
US1450067A (en) | Photographic transfer paper | |
US1327931A (en) | Reproducing manuscript, typewritten or printed matter, drawings, photographs, or thelike | |
US2214531A (en) | Color photography | |
US3149973A (en) | Wet and dry stripping film | |
US2268651A (en) | Adhesive lacquer | |
US6203970B1 (en) | Photographic element with porous membrane overcoat | |
US645209A (en) | Photographic film. | |
US406460A (en) | Ralph mcneill | |
US1710303A (en) | Method of producing photographic-process screens | |
US450963A (en) | Henky kuhn |