US2181485A - Gelatin relief - Google Patents
Gelatin relief Download PDFInfo
- Publication number
- US2181485A US2181485A US207226A US20722638A US2181485A US 2181485 A US2181485 A US 2181485A US 207226 A US207226 A US 207226A US 20722638 A US20722638 A US 20722638A US 2181485 A US2181485 A US 2181485A
- Authority
- US
- United States
- Prior art keywords
- silver halide
- emulsion
- sensitivity
- layer
- gelatin
- 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
- 108010010803 Gelatin Proteins 0.000 title description 14
- 229920000159 gelatin Polymers 0.000 title description 14
- 239000008273 gelatin Substances 0.000 title description 14
- 235000019322 gelatine Nutrition 0.000 title description 14
- 235000011852 gelatine desserts Nutrition 0.000 title description 14
- 229910052709 silver Inorganic materials 0.000 description 35
- 239000004332 silver Substances 0.000 description 35
- 239000000839 emulsion Substances 0.000 description 29
- -1 silver halide Chemical class 0.000 description 28
- 230000035945 sensitivity Effects 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 238000004043 dyeing Methods 0.000 description 7
- 230000031700 light absorption Effects 0.000 description 7
- 230000001235 sensitizing effect Effects 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 7
- 239000000975 dye Substances 0.000 description 6
- 238000005530 etching Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 241001479434 Agfa Species 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 229910052956 cinnabar Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000001046 green dye Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/40—Dyestuffs not covered by the groups G03C1/08 - G03C1/38 or G03C1/42
Definitions
- fsensitizing region is to be understood the region of the wave lengths of the spec- 15 tral sensitivity diminished by that of the natural sensitivity of the non-sensitizedl emulsion, that is to say that spectral region in which the sensitivity natural to the non-sensitized silver halide emulsion is increased by the sensitizing.
- a silver bromide emulsion the sensitivity 5 curve of which towards the long wave lengths extends to l480 ma (A in Figure 1) is sensitized orthochromatically so that its sensitivity now extends to 600 mp (as indicatedat B).
- this sensitized emulsion is mixed with a blue-green dye, for instance, Fanalbremerblau (cf. Schultz, Farbstoiftabellen, '7th edit., vol. I, 1931, No. 826) the light absorption curve l5 of whichbegins at 530 ma (as indicated at C) and increases towards the long wave lengths.
- a panchromatically sensitized silver halide emulsion the sensitivity of which is ⁇ represented by the curve I shown in Figure 2 is made useful 20 .for etched reliefs byV mixing'it with a finely dispersed colorless solid substanceof which the main part has a particle diameter not exceeding l n which substance does not influence the silver halide and is insoluble in the photographic treat- 25 ing baths, and with a blue-green dyestuff, (for sorption curve of which starts from 500 ma (C) and extends to any point above 520 ma.
- a dye cinnabar, for instance
- a process of producing a gelatin relief for printing which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not affect the silver halide and is insoluble in the photographic treating baths, sensitizing said silver halide emul Y sion panchromatically, mixing said silver halide emulsion with a dyestuif the light absorption curve of which embraces the region between 570 and 700 mi, casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
- a process of producing a gelatin relief for printing which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not aiect the silver halide and is insoluble in the halide emulsion orthochromatically, mixing said silver halide emulsion Witha dyestuif the light absorption curve of which begins at 530 ma and increases towards the long wave lengths,
- a process of producing a gelatin relief for printing which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not aiect the silver halide and is insoluble in the photographic treating baths, sensitizing said silver halide emulsion orthochromatically, mixing said silver halide emulsion with a dyestuff the light absorption curve of which begins in the long-Wave region at 600 mp and extends'towards the short wave lengths up to any point, casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
- a photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 p. which substance does not affect the silver 4halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized for a spectral region different from its initial sensitivity and being colored only with a dyestuft' of a color complementary only to a part of said spectral region.
- a photographic material which comprises y a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized panchromatically and being colored only with a dyestuff the light absorption curve of which embraces the region between 570 and r ma.
- a photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 p. which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized orthochromatically and being colored only with a dyestuff the light absorption curve of which begins at 530 me and increases towards the long wave lengths.
- a photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the-main part has a particle diameter not exceeding 1 p. which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized orthochromatically and being colored only with a dyestuff the light absorption curve of which begins in the long-Wave region at 600 ma and extends towards the short wave lengths up to any point.
Description
Nov. 28, 1939. M. HERBST Er A1. i 2,181,485
GELATIN RELIEF l Filed May 11, 1938 Ffa 3 HBSOlPf/ah CHRI/i 0f ADDED Pyf JENJITIV/TY CURKE 0F SEALS/T1251) EMULS/01V 4 I l l I l 700 650 j; 600 550 00l 21 450 E 400 35001;/
Patented Nov. 28, 1939 UNITED STATES PATENT OFFICE mim GELA'HNBELIEI' Max Herbst, Mannheim-Rheinau, and
hankenburger, Ludwigshafen, Germany allignor, by meme assignments, to Agfa Anloo Corporation, Binghamton, N. Y., a corporation of Delaware Application May 11, .1
Y In Germany 938, Serial No. 207m May 13. 193'!v 8 Claims. (Cl. ils-5.6) v
produced by dyeing the sensitized emulsion complementarily only to a part of the sensitizing region. By fsensitizing region is to be understood the region of the wave lengths of the spec- 15 tral sensitivity diminished by that of the natural sensitivity of the non-sensitizedl emulsion, that is to say that spectral region in which the sensitivity natural to the non-sensitized silver halide emulsion is increased by the sensitizing. Itfol- 20 lows that, for example, yellow or orange dyeings, such as are used in the duplicating lms and the like or for damping the blue sensitivity, that is to say the natural sensitivity of the silver halide, are not within this invention.
I Further objects of the invention will appear from the following description. *f'
Reference is made to the accompanying diagrams 1 to 4 which illustrate the invention for diiferent spectral regions. y
n The advantage of a dyeing which is only in part complementary consists especially in an essential increase of general sensitivity. Any dyeing which absorbs light in the region ofl the sensitivity of the silver halide'to light diminishes the sensitivity on purely optical grounds; by a narrow spectral limitation of the dyeing, however, this loss of sensitivity is diminished, On the other hand, since it has been found that wholly undyed silver halide layers yield objectionably a hard reliefs, it was unexpected 'that a dyeing.
only violet, blue and green of short wave length,
that is to say is only complementary to the natural sensitivity of the silver halide, is practically o ineifective in respect of improving gradatlon of the etching. f
It is advantageous to use such colorings as have an increasing absorption capacity towards-the' long wave lengths starting from 540 ma or still u longer, since it is plau'ticularlyv the light of the-`V v long wave length that produces gradation for etched reliefs.
The following examples illustrate the invention but they are not intended to limit it thereto:
1. A silver bromide emulsion, the sensitivity 5 curve of which towards the long wave lengths extends to l480 ma (A in Figure 1) is sensitized orthochromatically so that its sensitivity now extends to 600 mp (as indicatedat B). The region between A and B'corresponds with the sensitizl() ing region. In order to make this sensitized emulsion suitable for etched reliefs, it is mixed with a blue-green dye, for instance, Fanalbremerblau (cf. Schultz, Farbstoiftabellen, '7th edit., vol. I, 1931, No. 826) the light absorption curve l5 of whichbegins at 530 ma (as indicated at C) and increases towards the long wave lengths.
2. A panchromatically sensitized silver halide emulsion the sensitivity of which is`represented by the curve I shown in Figure 2 is made useful 20 .for etched reliefs byV mixing'it with a finely dispersed colorless solid substanceof which the main part has a particle diameter not exceeding l n which substance does not influence the silver halide and is insoluble in the photographic treat- 25 ing baths, and with a blue-green dyestuff, (for sorption curve of which starts from 500 ma (C) and extends to any point above 520 ma.
4. An orthochromatically sensitized silver hal- 40 ide gelatin emulsion the sensitivity curve of which extends to 6,20 mu (sensitizing region AB, cf. Figure 4) is coloredwith a dye (cinnabar, for instance) the luminous absorption capacity of which begins in the long wave range at 600 ma `i5 (G) and extends towards the short wave lengths up to any points, for instance 500 ma (C), 42 mp. (E) or still further` (F).
For obtaining gelatin reliefs for printing the emulsion layers as above described are exposed 50 to light, developed by the usual method without tanning Aand fixed. The relief is produced by v etchingwith a solution ofh'ydrogenperoxide (cf. .Wall, The History of-Three-Color Photography,
1925. page 857).
f photographic treating baths, sensitizing said silver ceeding 1 p. which substance does not affect the silver halide and is insoluble in the photographic treating baths, sensitizing said silver halide emul- A sion for a spectral region diierent from its initial sensitivity, dyeing said silver halide emulsion in a color complementary only to a partof said spectral region, casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
2. A process of producing a gelatin relief for printing. which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not affect the silver halide and is insoluble in the photographic treating baths, sensitizing said silver halide emul Y sion panchromatically, mixing said silver halide emulsion with a dyestuif the light absorption curve of which embraces the region between 570 and 700 mi, casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
3. A process of producing a gelatin relief for printing which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not aiect the silver halide and is insoluble in the halide emulsion orthochromatically, mixing said silver halide emulsion Witha dyestuif the light absorption curve of which begins at 530 ma and increases towards the long wave lengths,
' casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
4. A process of producing a gelatin relief for printing which comprises incorporating in a silver halide gelatin emulsion a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not aiect the silver halide and is insoluble in the photographic treating baths, sensitizing said silver halide emulsion orthochromatically, mixing said silver halide emulsion with a dyestuff the light absorption curve of which begins in the long-Wave region at 600 mp and extends'towards the short wave lengths up to any point, casting said emulsion on a support to form a layer, producing a latent image in said layer, developing said image to a silver picture, and etching said layer to form a relief.
5. A photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 p. which substance does not affect the silver 4halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized for a spectral region different from its initial sensitivity and being colored only with a dyestuft' of a color complementary only to a part of said spectral region.
6. A photographic material which comprises y a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 a which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized panchromatically and being colored only with a dyestuff the light absorption curve of which embraces the region between 570 and r ma.
7. A photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the main part has a particle diameter not exceeding 1 p. which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized orthochromatically and being colored only with a dyestuff the light absorption curve of which begins at 530 me and increases towards the long wave lengths.
8. A photographic material which comprises a support and attached to said support a silver halide gelatin emulsion layer containing a solid substance of which the-main part has a particle diameter not exceeding 1 p. which substance does not affect the silver halide and is insoluble in the photographic treating baths, said emulsion layer being sensitized orthochromatically and being colored only with a dyestuff the light absorption curve of which begins in the long-Wave region at 600 ma and extends towards the short wave lengths up to any point.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2181485X | 1937-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2181485A true US2181485A (en) | 1939-11-28 |
Family
ID=7988896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US207226A Expired - Lifetime US2181485A (en) | 1937-05-13 | 1938-05-11 | Gelatin relief |
Country Status (2)
Country | Link |
---|---|
US (1) | US2181485A (en) |
FR (1) | FR837739A (en) |
-
1938
- 1938-05-09 FR FR837739D patent/FR837739A/en not_active Expired
- 1938-05-11 US US207226A patent/US2181485A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR837739A (en) | 1939-02-20 |
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