GB1109484A - Photographic printing process and apparatus for carrying out the same - Google Patents

Photographic printing process and apparatus for carrying out the same

Info

Publication number
GB1109484A
GB1109484A GB1485365A GB1485365A GB1109484A GB 1109484 A GB1109484 A GB 1109484A GB 1485365 A GB1485365 A GB 1485365A GB 1485365 A GB1485365 A GB 1485365A GB 1109484 A GB1109484 A GB 1109484A
Authority
GB
United Kingdom
Prior art keywords
gradation
exposure time
shutter
intensity
wedge
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
Application number
GB1485365A
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of GB1109484A publication Critical patent/GB1109484A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/02—Sensitometric processes, e.g. determining sensitivity, colour sensitivity, gradation, graininess, density; Making sensitometric wedges
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

1,109,484. Controlling gradation. FUJI SHASHIN FILM KABUSHIKI KAISHA. April 7, 1965 [April 8, 1964], No. 14853/65. Headings G2A and G2C. In photographic printing, in which the density of the printed image depends on the product of the light intensity and the exposure time, the gradation is controlled by varying the exposure time inversely with the intensity so that an image of the desired density and gradation is obtained. The exposure time is from 1 to 0À01 sec., or less. Thus various gradations can be obtained from one kind of printing paper, avoiding the necessity for providing different papers of varying degrees of hardness or softness. Fig. 2 shows a suitable apparatus. A light source 1 is controlled from a power supply 2, and the light passes through a condenser lens 6, negative 7, an objective lens 8 and iris diaphragm 9 to the printing paper 10. Also in the light path are a step wedge 4 and a shutter 3. Wedge 4 controls the light intensity, and shutter 3 the exposure time. These are varied inversely with respect to each other by means of a gradation selector 5, adjusted after inspection of the negative to give the required gradation and density. Alternatively the selector 5 may couple the wedge 4 and power supply 2 to provide inverse variation of intensity and time, in which case the shutter 3 may be omitted.
GB1485365A 1964-04-08 1965-04-07 Photographic printing process and apparatus for carrying out the same Expired GB1109484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1947164 1964-04-08

Publications (1)

Publication Number Publication Date
GB1109484A true GB1109484A (en) 1968-04-10

Family

ID=12000221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1485365A Expired GB1109484A (en) 1964-04-08 1965-04-07 Photographic printing process and apparatus for carrying out the same

Country Status (3)

Country Link
CH (1) CH428437A (en)
DE (1) DE1472891A1 (en)
GB (1) GB1109484A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947207A (en) * 1988-12-05 1990-08-07 Eastman Kodak Company Apparatus for exposing photographic materials
DE19538593A1 (en) * 1995-10-17 1997-04-24 Agfa Gevaert Ag Copying method for photographic originals with different density range

Also Published As

Publication number Publication date
DE1472891A1 (en) 1968-12-12
CH428437A (en) 1967-01-15

Similar Documents

Publication Publication Date Title
US3462221A (en) Method for controlling the quality of photographic image
US3335636A (en) Fully automated process camera
US3119301A (en) Lighting system for photographic cameras
US3680956A (en) Apparatus for controlling contrast during reproduction of photographic images
GB1109484A (en) Photographic printing process and apparatus for carrying out the same
US3876303A (en) Method and apparatus for continuous, successive or stepwise exposure of a light-sensitive material
GB1044631A (en) Photographic printer
JPS57207236A (en) Photographic printer
US3650624A (en) Photographic printer with automatic exposure control
US1861515A (en) Process of printing motion pictures
US2533650A (en) Process of making half-tone negatives
US1598746A (en) Method and apparatus for photographic flashing
JPS5789748A (en) Exposure time controlling method of picture copying device
US1954097A (en) Process for producing balanced half tones
US3510221A (en) Method of photographic reproduction
GB1269265A (en) Method of producing photographic negatives and prints
US3379110A (en) Exposure control system
JPS56113138A (en) Engraving method
GB1179318A (en) Improvements in or relating to Automatically Producing Prints from Strip Film.
US1912740A (en) Apparatus for photographic printing
US1820494A (en) Photo printing machine
US3409365A (en) Contact printer
US1576118A (en) Color photography
US1917360A (en) Film printing
SU143655A1 (en) Method of making forms of flat printing