GB485552A - Method of producing colour selection pictures from multicolour master images - Google Patents
Method of producing colour selection pictures from multicolour master imagesInfo
- Publication number
- GB485552A GB485552A GB2292736A GB2292736A GB485552A GB 485552 A GB485552 A GB 485552A GB 2292736 A GB2292736 A GB 2292736A GB 2292736 A GB2292736 A GB 2292736A GB 485552 A GB485552 A GB 485552A
- Authority
- GB
- United Kingdom
- Prior art keywords
- images
- blue
- printing
- coloured
- image
- 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
Links
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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/18—Processes for the correction of the colour image in subtractive colour photography
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
485,552. Printing colour record photographic images. GASPAR, 13. Aug. 20, 1936, Nos. 22927 /36 and 11085/37. Drawings to Specification. [Class 98 (ii)] To avoid the reproduction of unwanted images in printing the part images from a multicolour subtractive record, e.g. on multilayer material, with coloured light, the printing lights are chosen so that the ratio of the absorption of the printing light by the image to be reproduced to the absorption of the light by the undesired image is a maximum, or in the case of more than two images, the smallest of such ratios is a maximum. The printing light may be provided by a source emitting a line spectrum, for example suitable sources are arcs, sparks, discharges in rarefied gases, or lamps in which atomic line spectra are excited by heat, thermal emission, or optically as in resonance tubes. Alternatively, sources emitting band spectra may be used in conjunction with a filter. To avoid the difficulty of overlapping absorption of the dyes constituting the original image, images in which the concentration of the dyestuffs is unbalanced may be used, for example images in which the concentration of dye in the yellow image is considerably increased. Examples of the effect of printing with various sources of light, from images dyed with various dyes in balanced and unbalanced concentration are given in the Specification. The images may be developed to the same or different degrees of contrast. Separate part images may be produced or the printing performed on multilayer material. For example, a multicolour image comprising a blue component record coloured blue-green, a red component record coloured magenta, and a green component record coloured yellow is printed onto three layer material comprising a blue-sensitive layer coloured magenta, a layer sensitized with pinacyanol blue and coloured yellow, and a red-sensitive layer coloured blue-green. Printing is effected of the red record with thallium light, and the other two records with mercury and cadmium lights respectively. If the layers are superimposed on one side of the material and the lower layers separated by a hardened gelatin layer, different gamma values may be obtained in the three layers on development in a single developer. The silver images may be converted into dye images in known manner, e.g. by means of a bath of thiocarbamide and citric acid. In another example, material is used consisting of a colourless red-sensitive layer, a yellow green-sensitive layer, and a colourless blue-sensitive layer, nearest the support. After exposure through the support, developing, and fixing, the uppermost layer is dyed red, and the images in the two upper layers converted to dye images with a bath of acidified thiourea or potassium iodide. The image in the layer nearest the support is then converted into silver ferrocyanide and treated with ferric sulphate giving a Prussian-blue image. The blue picture is then printed with potassium or caesium light onto material sensitized with pinacyanol blue and the red and green partial pictures with cadmium and mercury lights respectively. Further examples are given. A geometrical method of determining the gamma values to which each of the prints is to be developed according to the density of the dyestuffs in the master images is also given in the Specification.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE423203D BE423203A (en) | 1936-08-20 | ||
GB2292736A GB485552A (en) | 1936-08-20 | 1936-08-20 | Method of producing colour selection pictures from multicolour master images |
CH207085D CH207085A (en) | 1936-08-20 | 1937-08-19 | Photographic process for making sets of partial color copies of multicolor images. |
FR825793D FR825793A (en) | 1936-08-20 | 1937-08-20 | Method for producing copies of multicolored keyframes |
US270269A US2207361A (en) | 1936-08-20 | 1939-04-27 | Freight car construction |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2292736A GB485552A (en) | 1936-08-20 | 1936-08-20 | Method of producing colour selection pictures from multicolour master images |
GB1108537 | 1937-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB485552A true GB485552A (en) | 1938-05-20 |
Family
ID=26248035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2292736A Expired GB485552A (en) | 1936-08-20 | 1936-08-20 | Method of producing colour selection pictures from multicolour master images |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE423203A (en) |
CH (1) | CH207085A (en) |
FR (1) | FR825793A (en) |
GB (1) | GB485552A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018029014A1 (en) * | 2016-08-10 | 2018-02-15 | Cambridge Display Technology Limited | Light filter and sensor |
-
0
- BE BE423203D patent/BE423203A/xx unknown
-
1936
- 1936-08-20 GB GB2292736A patent/GB485552A/en not_active Expired
-
1937
- 1937-08-19 CH CH207085D patent/CH207085A/en unknown
- 1937-08-20 FR FR825793D patent/FR825793A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018029014A1 (en) * | 2016-08-10 | 2018-02-15 | Cambridge Display Technology Limited | Light filter and sensor |
CN109564162A (en) * | 2016-08-10 | 2019-04-02 | 剑桥显示技术有限公司 | Light filtering body and sensor |
US20190219750A1 (en) * | 2016-08-10 | 2019-07-18 | Cambridge Display Technology Limited | Light filter and sensor |
Also Published As
Publication number | Publication date |
---|---|
FR825793A (en) | 1938-03-14 |
BE423203A (en) | |
CH207085A (en) | 1939-09-30 |
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