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
  • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
  • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds
  • G03C1/732—Leuco dyes
• • 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
  • G03C5/56—Processes using photosensitive compositions covered by the groups G03C1/64 - G03C1/72 or agents therefor

Definitions

• the principal object of this invention is to provide a procedure for reproducing silver halidefilm negatives.
• the procedure consists of the following sequence of steps, starting with a silver halide negative bearing the radiant energy provided by two General Electric sun lamps. This produces the blue second-generation positive print and, depending on the exposure, may produce a change in contrast and gamma or may reproduce the original negative with these characteristics essentially unchanged.
• the second step in the procedure is the printing of a third-generation negative image by exposing a suitable photosensitive composition to suitably filtered visible radiation provided by a photoflood lamp, through the blue second-generation print.
• a suitable photosensitive composition to suitably filtered visible radiation provided by a photoflood lamp
• the photosensitive material utilized for the third-generation print is one based on 3,281,242 Patentedv Oct. 25, 1966 "ice Example 14 of United States Patent 3,109,736, for example. At this point the image is a black negative image.
• the ultraviolet-sensitive diphenylamine-c-arbon tetrabromide blue-image copy material identified in the tables below as blue image material was prepared as follows: A coating solution was prepared according to the follow ing formula:
• This solution was applied by a meniscus coating technique on a roll coating machine to a polyester film base of 3-mil thickness, which had been presubbed with a cellulose ester receptive layer.
• the solution was absorbed bythe sublayer on the film, the quantity of material taken up being regulated by the speed of travel of the film.
• the visible-light-sensitive trinuclear merocyanine base black-image copy material identified in the tables below as black image material was prepared as follows.
• a coating solution was prepared according to the following formula. (The trinuclear merocyanine base referred to as Dye below has the struture shown):
• contrast is intended to mean the difference in visual brilliance between one part of an image and another and is proportional to the product of TABLE II Exposure Conditions Gener- Film D-max. D-min. AD Gamma ation '7 Filter Lights Time FROM LOW-CONTRAST NEGATIVE Negative 0. 70 0. 19 0. 51 0. 47 Blue Image Material" Four GESL 2.5 min 1. 24 0. 51 0.73 O. 75 Black Image MateriaL Four DXC. 3 min 1.48 0. 65 0. 83 0. 84 .d0 do 3min 1.20 0.27 0.93 1.05
• the densities of the step tablet portion of the print were read with a densitometer through an appropriate filter and the results were plotted on a density vs. step curve to illustrate the tonal range achieved with each generation.
• the two photosensitive compositions utilized namely those described in Wainer United States Patent 3,042,515 and those described in United States Patent 3,109,736 are particularly suited to the multigeneration printing process described whereby silver halide negatives exhibiting an unsatisfactory contrast AD and/or 'y may be reprinted first on a diphenylaminetive makes with the horizontal when the density is plotted versus the logarithm of the exposure, i.e. a gamma of 1 is equal to a slope of 45.
• gamma serves to measure the contrast, i. e. the rate at which density increases as the exposure increases, in the straight line portion of the H-D curve.
• a process for obtaining a negative with a contrast of about 1 and a gamma of about 1 from a negative possessing an image in which at least one of the contrast and the gamma has a value appreciably difierent from unity which comprises:

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Photometry And Measurement Of Optical Pulse Characteristics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Priority Applications (6)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23349708

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (3)

• 1964
  • 1964-02-12 US US344254A patent/US3281242A/en not_active Expired - Lifetime
  • 1964-11-26 GB GB48148/64A patent/GB1083734A/en not_active Expired
  • 1964-12-02 NL NL6414006A patent/NL6414006A/xx unknown
  • 1964-12-04 DE DE19641547933 patent/DE1547933A1/de active Pending
• 1965
  • 1965-02-12 BE BE659686D patent/BE659686A/xx unknown

Patent Citations (3)

Also Published As

Similar Documents