EP0565756A1 - Verfahren und Vorrichtung zur Herstellung photographischer Kopien - Google Patents

Verfahren und Vorrichtung zur Herstellung photographischer Kopien Download PDF

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Publication number
EP0565756A1
EP0565756A1 EP92106487A EP92106487A EP0565756A1 EP 0565756 A1 EP0565756 A1 EP 0565756A1 EP 92106487 A EP92106487 A EP 92106487A EP 92106487 A EP92106487 A EP 92106487A EP 0565756 A1 EP0565756 A1 EP 0565756A1
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EP
European Patent Office
Prior art keywords
color
black
medium
developing
matrices
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.)
Withdrawn
Application number
EP92106487A
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English (en)
French (fr)
Inventor
Gianpaolo Tomasi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP92106487A priority Critical patent/EP0565756A1/de
Publication of EP0565756A1 publication Critical patent/EP0565756A1/de
Withdrawn legal-status Critical Current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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes

Definitions

  • the present invention relates to a method and device for producing photographic duplicates.
  • the copies obtained are of a typographic type, i.e. the quality definition of the copy obtained is assuredly lower than the original, regardless of whether it is a photographic copy or a developed reversible film;
  • reproducibility i.e. the number of copies which can be obtained, is limited, since the intermediate matrices wear intensely and rapidly; furthermore, the time required to obtain the copy of the original is very long and requires the use of specialized personnel, both for the adjustment of various machines used for this operation and for developing and the intermediate operations.
  • the aim of the present invention is to eliminate or substantially reduce the problems described above by providing a device and method for producing photographic duplicates which allows to maintain the same resolution as the original in the produced copy.
  • an object of the present invention is to provide a device and method which do not require specialized personnel.
  • Another object of the present invention is to provide a device and method which substantially reduce the time required to produce the copy starting from the original.
  • Not least object of the present invention is to provide a device and method which are relatively easy to execute and at competitive costs.
  • a device for producing photographic duplicates characterized in that it comprises at least one color scanner suitable for producing a plurality of matrices, one for each of the primary colors, starting from an initial medium, at least one continuous-tone black-and-white developing unit suitable for developing said plurality of matrices, at least one bromography unit provided with filters in the primary colors suitable for exposing a final medium starting from said plurality of matrices, and a color developing unit suitable for developing said photographic paper.
  • a device for producing photographic duplicates comprises a color scanner 1 for producing four matrices, or rather for exposing four black-and-white sensitive photographic films, one for each of three primary colors of the additive three-color process, i.e. red, green and blue, and one for the color black, starting from an initial medium, which can be a color photograph or a color slide or a print and the like.
  • the scanner allows to achieve unexpected qualitative results.
  • a type CP 340 scanner is the best for providing continuous tone: the light source is a tungsten lamp which is able to write, in an extremely fine manner, 400 perfect lines per centimeter. The result is a soft, continuous image, without breaks and at the same time with excellent detail, modeling in the lights and separation of the photographic planes and volumes in the shadows.
  • the scanner has a large output format on continuous-tone film (123 x 128 cm); it is able to expose four 50x60 matrices with just two scans.
  • the device furthermore comprises a continuous-tone black-and-white developing unit 2 for developing the black-and-white sensitive photographic films so as to obtain a usable black-and-white negative from each exposed film.
  • the device furthermore comprises a bromography unit 3 which is provided with filters in the primary colors, i.e. red, green and blue, in order to expose a final color medium starting from the films developed in the developing unit.
  • the final color medium may be color photographic paper or color reversible film or the like.
  • the device comprises a color developing unit 4 for developing the photographic paper or the reversible film.
  • the process for producing photographic duplicates comprises the following steps: a scanning step, during which each primary color of the additive three-color process, i.e. red, green and blue, and black, are scanned separately in the scanner 1 in continuous tone from the initial medium, which can be for example a print, a photographic positive, a color slide, a positive image of the POLAROIDTM type and the like; a transfer step, during which the scanner 1 transfers the information related to each individual scan of the scanning step onto a black-and-white photographic plate in order to produce a plate for each of the above defined four colors.
  • the initial medium which can be for example a print, a photographic positive, a color slide, a positive image of the POLAROIDTM type and the like
  • a transfer step during which the scanner 1 transfers the information related to each individual scan of the scanning step onto a black-and-white photographic plate in order to produce a plate for each of the above defined four colors.
  • the scanning and transfer steps occur substantially simultaneously, since the time difference between the two is linked to the time required to transmit the information from the scanning section to the transfer section; a monochrome developing step, during which each individual black-and-white photographic plate is developed in the developing unit 2, in a per se known manner. This step is performed in continuous tone, so as to obtain the maximum color resolution on the black-and-white film, i.e.
  • a printing step during which a final medium, constituted for example by color photographic paper, or by color sensitive film, or by a similar medium, is exposed in the bromography unit 3 by means of the previously developed plates, using the related colored filter for each black-and-white photographic plate in order to produce the additive three-color process on the final medium; a developing step, during which the final medium exposed in the preceding step is developed in the color developing unit 4 in order to obtain a positive duplicate of the initial medium, or a negative copy or a color slide of the initial medium, this depending on the type of final medium used.
  • the result is a photographic positive; instead, in the case of a reversible film, the result is a color slide, whereas in the case of conventional color film the result is a photographic negative which can easily be printed with conventional methods.
  • the process performed with the described device requires a time which varies between one and three hours to be completed, instead of the working day which is currently required with known duplication processes.
  • the time variation depends essentially on the physical size of the initial medium and of the final medium.
  • this process duplicates POLAROIDTM positives into photographic positives, significantly improving the quality of the final copy with respect to the initial copy, thus obtaining a significant improvement in the colors, tones and resolution of said image.
  • a further advantage which is obtained consists of the fact that the duplicates currently made are affected by the typical resolution of the process used, such as for example rotogravure, which always requires a screen for printing and very accurate registration in order to obtain an acceptable final print.
  • the resolution of the image in the described process depends exclusively on the type of color-sensitive paper or other medium used, and thus has a resolution which is assuredly higher than known processes.
  • the device it can be advantageously integrated in a single machine or be composed of the individual described machines, which are per se known.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)
EP92106487A 1992-04-15 1992-04-15 Verfahren und Vorrichtung zur Herstellung photographischer Kopien Withdrawn EP0565756A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92106487A EP0565756A1 (de) 1992-04-15 1992-04-15 Verfahren und Vorrichtung zur Herstellung photographischer Kopien

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92106487A EP0565756A1 (de) 1992-04-15 1992-04-15 Verfahren und Vorrichtung zur Herstellung photographischer Kopien

Publications (1)

Publication Number Publication Date
EP0565756A1 true EP0565756A1 (de) 1993-10-20

Family

ID=8209548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106487A Withdrawn EP0565756A1 (de) 1992-04-15 1992-04-15 Verfahren und Vorrichtung zur Herstellung photographischer Kopien

Country Status (1)

Country Link
EP (1) EP0565756A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999004099A1 (en) 1997-07-16 1999-01-28 Minnesota Mining And Manufacturing Company Pavement marking having raised protuberances and method of making
US5941655A (en) * 1997-07-16 1999-08-24 3M Innovative Properties Company Direction-indicating pavement marking having raised protuberances and method of making

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857709A (en) * 1973-01-31 1974-12-31 S Domeshek Method of enhancing the information legibility of multi-color graphic material
DE3709724A1 (de) * 1986-03-25 1987-10-01 Fuji Photo Film Co Ltd Verfahren und einrichtung zum bildschirmkopieren zur herstellung einer kopie eines bildeindruckes von einem bildschirm mit buchstaben
JPS6347772A (ja) * 1986-08-15 1988-02-29 Toshiba Corp 画像形成装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857709A (en) * 1973-01-31 1974-12-31 S Domeshek Method of enhancing the information legibility of multi-color graphic material
DE3709724A1 (de) * 1986-03-25 1987-10-01 Fuji Photo Film Co Ltd Verfahren und einrichtung zum bildschirmkopieren zur herstellung einer kopie eines bildeindruckes von einem bildschirm mit buchstaben
JPS6347772A (ja) * 1986-08-15 1988-02-29 Toshiba Corp 画像形成装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 259 (P-733)21 July 1988 & JP-A-63 047 772 ( TOSHIBA ) 29 February 1988 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999004099A1 (en) 1997-07-16 1999-01-28 Minnesota Mining And Manufacturing Company Pavement marking having raised protuberances and method of making
US5941655A (en) * 1997-07-16 1999-08-24 3M Innovative Properties Company Direction-indicating pavement marking having raised protuberances and method of making
US6326053B1 (en) 1997-07-16 2001-12-04 3M Innovative Properties Company Method of making pavement markings having raised protuberances

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