US2912343A - Production of photographic material - Google Patents
Production of photographic material Download PDFInfo
- Publication number
- US2912343A US2912343A US772956A US77295658A US2912343A US 2912343 A US2912343 A US 2912343A US 772956 A US772956 A US 772956A US 77295658 A US77295658 A US 77295658A US 2912343 A US2912343 A US 2912343A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- coating
- color
- colour
- silver halide
- 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
- 239000000463 material Substances 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000000839 emulsion Substances 0.000 claims description 58
- 239000011248 coating agent Substances 0.000 claims description 35
- 238000000576 coating method Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 16
- 229910052709 silver Inorganic materials 0.000 claims description 16
- 239000004332 silver Substances 0.000 claims description 16
- -1 SILVER HALIDE Chemical class 0.000 claims description 14
- 230000006872 improvement Effects 0.000 claims description 3
- ORWQBKPSGDRPPA-UHFFFAOYSA-N 3-[2-[ethyl(methyl)amino]ethyl]-1h-indol-4-ol Chemical compound C1=CC(O)=C2C(CCN(C)CC)=CNC2=C1 ORWQBKPSGDRPPA-UHFFFAOYSA-N 0.000 claims 1
- 239000000975 dye Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 10
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 230000001235 sensitizing effect Effects 0.000 description 5
- 108010010803 Gelatin Proteins 0.000 description 4
- 229920000159 gelatin Polymers 0.000 description 4
- 239000008273 gelatin Substances 0.000 description 4
- 235000019322 gelatine Nutrition 0.000 description 4
- 235000011852 gelatine desserts Nutrition 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 125000001891 dimethoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 239000000080 wetting agent Substances 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/388—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor
-
- 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
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
- G03C1/102—Organic substances dyes other than methine 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
- G03C1/00—Photosensitive materials
- G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
Definitions
- a photographic element which comprises a support carrying three silver halide photographic emulsion layers which are differentially sensitive to three regions of the visible spectrum, normally blue, green and red, and which contain compounds, so-called colour couplers, which will combine with the oxidation products of aromatic primary amino developing agents used to develop silver images in the layers to form dye images which are complementary to the utilised sensitivity of the respective layers.
- the photographic element may comprise the following layers in super position:
- the assembly may contain other layers, e.g. outer layers, masking layers, substratum and supercoat layers, according to the specific requirements in the product.
- the specified yellow filter layer (d) acts as a barrier to blue light reaching layers (b) and (c).
- the present invention in the method of producing colour photographic materials whichcom'prises applying to a support layer a silver halide photographic emulsion which contains a coloursensitising dye and .a colour coupler, or other compound the presence of which tends to reduce the sensitivity of the emulsion, the emulsion containing the colour-sensitising dye and a solution of the colour coupler or said other compound are intimatelyadmixed in the required proportion at or near the siteof the coating device and the mixture is coated with the minimum possible time delay between the time of mixing and the time when the emulsion is coated, and the coated emulsion is set and dried with the minimum of delay.
- Various mechanical mixing devices known per se may be employed to produce the final emulsion for coating.
- theemulsion and additive solution may be pumped as separate streams to a mixing cylinder and pass, via baflies, directly to the coating head of the coating machine.
- any of the well known methods of coating photographic emulsions may be employed, but generally one difference in working must be employed. In some methods part of the emulsion passing the coating head runs back to the coating head, i.e. the excess over the requirement (set by the thickness of the layer to be coated) is returned to the main bulk of emulsion. These methods cannot generally be employed in accordance with the presrent invention since it means that part of the emulsion leaving the coating head, and which is still deteriorating in speed owing to the effect of the additive, becomes mixed in with the fresh emulsion thus reducing its overall speed. Accordingly, such methods must generally be adopted with the variation that any run-back of'emulsion is diverted and discarded. However, if the percentage run-back is not too excessive and the coating speed is fairly high, it is possible to set up equilibrium conditions in which, although there is some run-back, the photographic speed of the emulsion actually coated onthe support is not unduly reduced.
- those methods of coating will be employed in which there is no run-back of emulsion to the coating head, i.e. methods in which the quantity of emulsion passed by the coating head is strictly metered to that required to give the desired coating thickness. Moreover, it is important that at all times the quantity of prepared emulsion waiting to be coated shouldbe the min imum possible. For this reason so-called slab-coating is preferred.
- the method normally provides a small surplus of emulsion which is recirculated and it may therefore be provided that any increase in the overflow rate is electronically detected and the information fed back to control the coating speed. In this way it is arranged that any increase in overflow automatically increases coating speed and therefore the rate of pick-up of the emulsion, so that the overflow is immediately compensated.
- Example A silver halide emulsion containing 188 gms. of silver and 350 gms. of gelatin is spectrally sensitised to the red end of the spectrum during its manufacture by the addition of 600 mls. of a 1:2000 solution of 3:3'-dimethyl 6:6 dimethoxy 9[1:5 dimethyl 2 phenyl- 3-oxo pyrazolinyl (4)] thiacarbocyanine bromide: 260 gms. of gelatin and 100 mls. of wetting agent are added and after adjustment of the pH to 7.4 the total bulk is made up to 11,000 gms.
- the colour former solution which is the additive described in this example, contains 310 gms.
- the emulsion and colour former solutions are held in vessels thermostatically controlled at the coating temperature and each is fed into similar metering pumps driven at the same speed from a motor driven variable speed gear box so that although the ratio of the mixing of the two fluids is invariable yet the total flow can be adjusted to meet the requirements of coating.
- the metering pumps are of conventional design. The two metered flows are then fed into the mixing cylinder.
- a suitable mixing chamber is illustrated in the accompanying drawing. It consists of a small squat form cylinder 1 mounted vertically: a thick rotating spindle 2 runs centrally down the cylinder having its lower bearing on the base and its upper bearing on a bafiie 11 across the cylinder. Attached to the spindle at its lower end is a small plastic covered magnet 3 which serves a dual purpose; primarily it is the drive, this being achieved magnetically from outside by means of the rotating magnet 4 driven from the gear box 5 and the motor 6. Secondarily it serves as the first stage of mixing as the two liquids are fed into this section of the cylinder from opposite entry ports 7 and 8. This method of driving obviates the need for glands thus reducing the chances of contamination or the introduction of air bubbles.
- the upper portion of the cylinder 1 is divided by baflies 9 into segments, the liquid flow between the segments being at the periphery of the battles Mounted on the spindle and running closely between the baffles 9 are discs 10, the mixing being brought about by the rotation of the discs 10, the upward flow of liquid taking place at the outer edges of the bafiles 9 where it is sheared by the rotating discs 10. These may operate at 100 rpm.
- the mixed liquid then flows through holes in the baffie supporting the upper bearing, through the exit port 12 at the top of the cylinder 1, and then direct to the coating head where it is continuously coated on film base at a coating speed of 10 feet per minute.
- the coated film passes, a few seconds after being coated, through a chill-box which sets the emulsion, and then through a drying chamber.
- the additive is a colour coupler
- the additive is one which tends to reduce the sensitivity of the liquid emulsion over a period of time.
- the additive is a dyestuff, e.g. an azo dyestuif, which has such an effect.
- a method of producing colour photographic materials which comprises: preparing a color sensitized silver halide emulsion by adding a color sensitizing dye to a silver halide emulsion; thereafter adding to the sensitized emulsion a color coupler the presence of which tends to reduce the sensitivity of the emulsion, and thereafter applying the resulting composition to a support layer as a coating thereon; the improvement which comprises: deferring the addition of the color coupler solution to the color sensitized emulsion until the color sensitized emulsion has been brought to the site at which it is to be applied to the support layer and thereupon admixing the color coupler with the color sensitized emulsion; and promptly thereafter applying the freshly formed admixture to the support layer whereby the support is coated with the minimum possible time delay between the time of admixing and the time of coating, and the coating is set and dried with the minimum delay.
- a method of producing colour photographic materials which comprises: preparing a color sensitized silver halide emulsion by adding a color sensitizing dye to a silver halide emulsion; thereafter continuously adding to the sensitized emulsion a color coupler the presence of which tends to reduce the sensitivity of the emulsion, and thereafter continuously applying the resulting composition to a support layer as a coating thereon; the improvement which comprises: deferring the continuous addition of the color coupler solution to the color sensitized emulsion until the color sensitized emulsion has been brought to the site at which it is to be applied to the support layer and thereupon continuously admixing the color coupler with the color sensitized emulsion; and promptly thereafter continuously applying the freshly formed admixture to the support layer whereby the support is coated with the minimum possible time delay between the time of admixing and the time of coating, and the coating is set and dried with the minimum delay.
Description
Nov. 10, 1959 R. B. COLLlNS ETAL PRODUCTION OF PHOTOGRAPHIC MATERIAL Filed Nov. 10, 1958 United-States I Patent ice PRODUCTION or PHOTOGRAPHIC MATERIAL Ronald Bernard Collins and Stanley Frederick William Welford, Ilford, England, assignors to Ilford Limited, Ilford, England, a British company Application November-10, 1958, Serial No. 772,956
Claims priority, application Great Britain November 18, 1957 2 Claims. (Cl. 117- 34 This invention relates to the production of colour photographic materials. I
In one main method of colour photography there is provided a photographic element which comprises a support carrying three silver halide photographic emulsion layers which are differentially sensitive to three regions of the visible spectrum, normally blue, green and red, and which contain compounds, so-called colour couplers, which will combine with the oxidation products of aromatic primary amino developing agents used to develop silver images in the layers to form dye images which are complementary to the utilised sensitivity of the respective layers.
Thus, for example, the photographic element may comprise the following layers in super position:
(a) Colourless film support.
(b) Silver halide emulsion layer sensitised to red light by means of an appropriate sensitising dye and containing a colour coupler yielding a cyan image.
(c) Silver halide emulsion layer sensitised to green light by means of an appropriate sensitising dye and containing a colour coupler yielding a magenta image.
(d) A yellow filter layer the colour of which may be readily destroyed.
(e) Silver halide emulsion layer having its natural sensitivity to blue light and containing a colour coupler yielding a yellow image.
The assembly may contain other layers, e.g. outer layers, masking layers, substratum and supercoat layers, according to the specific requirements in the product. The specified yellow filter layer (d) acts as a barrier to blue light reaching layers (b) and (c). I,
When such a layer is processed by exposure, development in an ordinary black and white developer, reexposed, re-developed in a developer which is an aromatic primary amine such as N.N- diethyl-p-phenylene diamine, or its closely analogous compounds, and the silver removed from the product, there is obtained a film product which has positive images in cyan, magenta and yellow in layers (b), (c) and'(e)' respectively, and which thus presents by transmitted light a more or'less true colour record of the subject to which the film was exposed.
Such colour photographic material is of relatively slow speed, and though several factors contribute to this, one
important factor is that there is a tendency for the colour 7 couplers which are added to the emulsion layers to reduce very considerably the photographic speed of the layers. This is particularly so in the case of the redsensitised layer where the colour couplers yielding cyan dyes which are commonly used are phenolic compounds or naphtholic compounds. It appears probable that the colour coupler tends to displace the red-sensitising dye from the silver halide grains and thus, by reducing the effect of the dye, reduces the speed of the emulsion to red light very considerably. Attempts have been made to overcome this difficulty by a careful selection of red-sensitising dye (compare, for example, British Patent No.
' 2 625,992), but there are limits to this possibility and in fact no red-sesitising dye of adequate sensitising effect has yet been found which will be wholly unaffected by the addition to the emulsion of a phenolic type colour coupler.
It has now been found, however, that the reduction in speed of the emulsion consequent on the addition of the colour coupler takes place primarily While the emulsion is in liquid bulk form and will occur very much more slowly, if at all, after the emulsion has been coated and set-as, a layer onthe support. Thus the emulsion, containing the colour coupler, deteriorates in speed with time so that, as it is coated, the speed of the coating obtained decreases with consequent change in colour balance.
According to the present invention, therefore, in the method of producing colour photographic materials whichcom'prises applying to a support layer a silver halide photographic emulsion which contains a coloursensitising dye and .a colour coupler, or other compound the presence of which tends to reduce the sensitivity of the emulsion, the emulsion containing the colour-sensitising dye and a solution of the colour coupler or said other compound are intimatelyadmixed in the required proportion at or near the siteof the coating device and the mixture is coated with the minimum possible time delay between the time of mixing and the time when the emulsion is coated, and the coated emulsion is set and dried with the minimum of delay.
Various mechanical mixing devices known per se may be employed to produce the final emulsion for coating. Thus theemulsion and additive solution may be pumped as separate streams to a mixing cylinder and pass, via baflies, directly to the coating head of the coating machine.
Any of the well known methods of coating photographic emulsions may be employed, but generally one difference in working must be employed. In some methods part of the emulsion passing the coating head runs back to the coating head, i.e. the excess over the requirement (set by the thickness of the layer to be coated) is returned to the main bulk of emulsion. These methods cannot generally be employed in accordance with the presrent invention since it means that part of the emulsion leaving the coating head, and which is still deteriorating in speed owing to the effect of the additive, becomes mixed in with the fresh emulsion thus reducing its overall speed. Accordingly, such methods must generally be adopted with the variation that any run-back of'emulsion is diverted and discarded. However, if the percentage run-back is not too excessive and the coating speed is fairly high, it is possible to set up equilibrium conditions in which, although there is some run-back, the photographic speed of the emulsion actually coated onthe support is not unduly reduced.
Preferably those methods of coating will be employed in which there is no run-back of emulsion to the coating head, i.e. methods in which the quantity of emulsion passed by the coating head is strictly metered to that required to give the desired coating thickness. Moreover, it is important that at all times the quantity of prepared emulsion waiting to be coated shouldbe the min imum possible. For this reason so-called slab-coating is preferred. The method normally provides a small surplus of emulsion which is recirculated and it may therefore be provided that any increase in the overflow rate is electronically detected and the information fed back to control the coating speed. In this way it is arranged that any increase in overflow automatically increases coating speed and therefore the rate of pick-up of the emulsion, so that the overflow is immediately compensated.
Alternatively, various methods whereby the prepared Patented Nov. 10, 1959 emulsion is extruded on to the support may be employed.
It has been found that, by employing the method of this invention for the coating of the red-sensitive layer in the production of a colour film which, as normally prepared, has a Weston speed of about 10, it is possible to obtain film of identical colour characteristics but a Weston speed of 60 to 80.
The following example will serve to illustrate the invention:
Example A silver halide emulsion containing 188 gms. of silver and 350 gms. of gelatin is spectrally sensitised to the red end of the spectrum during its manufacture by the addition of 600 mls. of a 1:2000 solution of 3:3'-dimethyl 6:6 dimethoxy 9[1:5 dimethyl 2 phenyl- 3-oxo pyrazolinyl (4)] thiacarbocyanine bromide: 260 gms. of gelatin and 100 mls. of wetting agent are added and after adjustment of the pH to 7.4 the total bulk is made up to 11,000 gms. The colour former solution, which is the additive described in this example, contains 310 gms. of gelatin and 170 gms. of colour former (to form a cyan image) added as a 5% solution of the sodium salt of l-hydroxy-2-naphthoyl-stearylaminel--sulphonic acid. After adjustment of its pH to 7.4 the solution is diluted to a total bulk of 11,000 gms. The two solutions thus compounded have approximately equal viscosities measured as cps. at the temperature of coating, 355 C.: this equality of viscosity assists mixing: owing to the interaction of the colour former with the gelatin of the emulsion the viscosity of the mixed solutions rises to 18 cps.
The emulsion and colour former solutions are held in vessels thermostatically controlled at the coating temperature and each is fed into similar metering pumps driven at the same speed from a motor driven variable speed gear box so that although the ratio of the mixing of the two fluids is invariable yet the total flow can be adjusted to meet the requirements of coating. The metering pumps are of conventional design. The two metered flows are then fed into the mixing cylinder.
A suitable mixing chamber is illustrated in the accompanying drawing. It consists of a small squat form cylinder 1 mounted vertically: a thick rotating spindle 2 runs centrally down the cylinder having its lower bearing on the base and its upper bearing on a bafiie 11 across the cylinder. Attached to the spindle at its lower end is a small plastic covered magnet 3 which serves a dual purpose; primarily it is the drive, this being achieved magnetically from outside by means of the rotating magnet 4 driven from the gear box 5 and the motor 6. Secondarily it serves as the first stage of mixing as the two liquids are fed into this section of the cylinder from opposite entry ports 7 and 8. This method of driving obviates the need for glands thus reducing the chances of contamination or the introduction of air bubbles. The upper portion of the cylinder 1 is divided by baflies 9 into segments, the liquid flow between the segments being at the periphery of the battles Mounted on the spindle and running closely between the baffles 9 are discs 10, the mixing being brought about by the rotation of the discs 10, the upward flow of liquid taking place at the outer edges of the bafiles 9 where it is sheared by the rotating discs 10. These may operate at 100 rpm. The mixed liquid then flows through holes in the baffie supporting the upper bearing, through the exit port 12 at the top of the cylinder 1, and then direct to the coating head where it is continuously coated on film base at a coating speed of 10 feet per minute. The coated film passes, a few seconds after being coated, through a chill-box which sets the emulsion, and then through a drying chamber.
On examining a 500 foot length of the coating by sensitometric exposures through a filter passing only the longer wavelengths of the spectrum, no changes in speed were found, the whole coating being quite uniform.
In other experiments not employing the method described above but working with the same final emulsion, a gradual loss of red-sensitivity was found amounting to log E 0.30 over the period of time that would be taken in coating a 500 foot length (50 minutes).
Whilst the invention has been described with particular reference to the case where the additive is a colour coupler, it will be understood that it is applicable to any case where the additive is one which tends to reduce the sensitivity of the liquid emulsion over a period of time. Thus it also includes the case where the additive is a dyestuff, e.g. an azo dyestuif, which has such an effect.
What we claim is:
1. In a method of producing colour photographic materials which comprises: preparing a color sensitized silver halide emulsion by adding a color sensitizing dye to a silver halide emulsion; thereafter adding to the sensitized emulsion a color coupler the presence of which tends to reduce the sensitivity of the emulsion, and thereafter applying the resulting composition to a support layer as a coating thereon; the improvement which comprises: deferring the addition of the color coupler solution to the color sensitized emulsion until the color sensitized emulsion has been brought to the site at which it is to be applied to the support layer and thereupon admixing the color coupler with the color sensitized emulsion; and promptly thereafter applying the freshly formed admixture to the support layer whereby the support is coated with the minimum possible time delay between the time of admixing and the time of coating, and the coating is set and dried with the minimum delay.
2. In a method of producing colour photographic materials which comprises: preparing a color sensitized silver halide emulsion by adding a color sensitizing dye to a silver halide emulsion; thereafter continuously adding to the sensitized emulsion a color coupler the presence of which tends to reduce the sensitivity of the emulsion, and thereafter continuously applying the resulting composition to a support layer as a coating thereon; the improvement which comprises: deferring the continuous addition of the color coupler solution to the color sensitized emulsion until the color sensitized emulsion has been brought to the site at which it is to be applied to the support layer and thereupon continuously admixing the color coupler with the color sensitized emulsion; and promptly thereafter continuously applying the freshly formed admixture to the support layer whereby the support is coated with the minimum possible time delay between the time of admixing and the time of coating, and the coating is set and dried with the minimum delay.
References Cited in the file of this patent UNITED STATES PATENTS 2,280,300 Potter et a1. Apr. 21, 1942 2,295,276 Wilmanns et al. Sept. 8, 1942 2,415,644 Leonhard et al. Feb. 11, 1947
Claims (1)
1. IN A METHOD OF PRODUCING COLOUR PHOTOGRAPHIC MATERIALS WHICH COMPRISES: PREPARING A COLOR SENSIZED SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE TO A SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE SENSITIZED EMULSION A COLOR COUPLER THE PRESENCE OF WHICH TENDS TO REDUCE THE SENITIVITY OF THE EMULSION, AND THERETENDS TO REDUCE THE SENSITIVELY OF THE EMULSION, AND THERELAYER AS A COATING THEREON; THE IMPROVEMENT WHICH COMPRISES; DEFERRING THE ADDITION OF THE COLOR COUPLER SOLUTION TO THE COLOR SENSITIZED EMULSION UNTIL THE COLOR SENSITIZED EMULSION HAS BEEN BROUGHT TO THE SITE AT WHICH IT IS TO BE APPLIED TO THE SUPPORT LAYER AND THEREUPON ADMIXING THE COLOR COUPLER WITH THE COLOR SENSITIZED EMULSION AND PROMPTLY THEREAFTER APPLYING THE FRESHLY FORMED ADMIXTURE TO THE SUPPORT LAYER WHEREBY THE SUPPORT IS COATED WITH THE MINIMUM POSSIBLE TIME DELAY BETWEEN THE TIME OF ADMIXING AND THE TIME OF COATING, AND THE COATING IS SET AND DRIED WITH THE MINIMUM DELAY.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB35919/57A GB847143A (en) | 1957-11-18 | 1957-11-18 | Improvements in or relating to colour photographic materials |
Publications (1)
Publication Number | Publication Date |
---|---|
US2912343A true US2912343A (en) | 1959-11-10 |
Family
ID=10383007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US772956A Expired - Lifetime US2912343A (en) | 1957-11-18 | 1958-11-10 | Production of photographic material |
Country Status (2)
Country | Link |
---|---|
US (1) | US2912343A (en) |
GB (1) | GB847143A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3116913A (en) * | 1961-05-29 | 1964-01-07 | Lane Kingdon | Liquid agitating apparatus |
US3212887A (en) * | 1961-04-07 | 1965-10-19 | Minnesota Mining & Mfg | Laterally disposed coterminously adjacent multicolor area containing graphic reproduction receptor and electrophotographic process of using same |
US3632373A (en) * | 1968-04-01 | 1972-01-04 | Eastman Kodak Co | Method for preparing silver halide layers having substantially uniform image contrast |
US3996140A (en) * | 1975-02-07 | 1976-12-07 | Ab Tellusond | Apparatus for continuous liquid-liquid extraction of water with a solvent |
US4132511A (en) * | 1975-11-10 | 1979-01-02 | Varian Associates, Inc. | Damper for high pressure pumping system |
US4134769A (en) * | 1976-08-10 | 1979-01-16 | Mitsubishi Paper Mills, Ltd. | Offset printing plate |
US4416548A (en) * | 1980-03-13 | 1983-11-22 | Sunds Defibrator Aktiebolag | Apparatus for gas or liquid admixture |
EP0124795A2 (en) | 1983-04-11 | 1984-11-14 | Fuji Photo Film Co., Ltd. | Silver halide photographic emulsion |
US4496245A (en) * | 1983-03-07 | 1985-01-29 | International Business Machines Corporation | Liquid chromatography proportioning valve and mixer |
US4832991A (en) * | 1987-11-03 | 1989-05-23 | Eastman Kodak Company | Coating process |
US5061079A (en) * | 1989-03-10 | 1991-10-29 | Satake Chemical Equipment Mfg., Ltd. | Stirrer |
US5202218A (en) * | 1990-03-23 | 1993-04-13 | Mitsubishi Paper Mills Limited | Scanning exposing type lithographic printing plate with 1.5 wt. % of water or less |
US5445913A (en) * | 1994-02-25 | 1995-08-29 | Eastman Kodak Company | Process for the formation of heat image separation elements of improved sensitometry |
US5985535A (en) * | 1996-12-26 | 1999-11-16 | Fuji Photo Film Co., Ltd. | Method for producing silver halide emulsion and silver halide photographic emulsion |
US6022681A (en) * | 1997-04-18 | 2000-02-08 | Fuji Photo Film Co., Ltd. | Method for producing tabular silver halide grain emulsion |
US6109780A (en) * | 1998-01-22 | 2000-08-29 | S. P. Industries Inc. | Dynamic vortex impeller |
US20030103852A1 (en) * | 2001-12-04 | 2003-06-05 | Levitronix Llc | Dispensing apparatus for a fluid |
US20040114462A1 (en) * | 2001-03-08 | 2004-06-17 | Schunk Stephan Andreas | Process and devices for homogeneously mixing a solid phase which is present in finely dispersed state with a fluid |
US20080310253A1 (en) * | 2007-06-18 | 2008-12-18 | Asahi Sunac Corporation | Multi-component mixing apparatus |
US20090219780A1 (en) * | 2005-10-04 | 2009-09-03 | Jose Castillo | Mixing System Including a Flexible Bag, Specific Flexible Bag and Locating System for the Mixing System |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3033000A1 (en) * | 1980-09-02 | 1982-04-15 | Agfa-Gevaert Ag, 5090 Leverkusen | METHOD FOR PRODUCING DISPERSIONS AND PHOTOGRAPHIC MATERIALS |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2280300A (en) * | 1941-01-14 | 1942-04-21 | Defender Photo Supply Co Inc | Light sensitive photographic coating and method of manufacturing the same |
US2295276A (en) * | 1938-06-23 | 1942-09-08 | Gen Aniline & Film Corp | Photographic emulsion |
US2415644A (en) * | 1942-11-16 | 1947-02-11 | Harold L Austin | Method and apparatus for continuously applying a coating to a web and controlling the thickness of the same |
-
1957
- 1957-11-18 GB GB35919/57A patent/GB847143A/en not_active Expired
-
1958
- 1958-11-10 US US772956A patent/US2912343A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2295276A (en) * | 1938-06-23 | 1942-09-08 | Gen Aniline & Film Corp | Photographic emulsion |
US2280300A (en) * | 1941-01-14 | 1942-04-21 | Defender Photo Supply Co Inc | Light sensitive photographic coating and method of manufacturing the same |
US2415644A (en) * | 1942-11-16 | 1947-02-11 | Harold L Austin | Method and apparatus for continuously applying a coating to a web and controlling the thickness of the same |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212887A (en) * | 1961-04-07 | 1965-10-19 | Minnesota Mining & Mfg | Laterally disposed coterminously adjacent multicolor area containing graphic reproduction receptor and electrophotographic process of using same |
US3116913A (en) * | 1961-05-29 | 1964-01-07 | Lane Kingdon | Liquid agitating apparatus |
US3632373A (en) * | 1968-04-01 | 1972-01-04 | Eastman Kodak Co | Method for preparing silver halide layers having substantially uniform image contrast |
US3996140A (en) * | 1975-02-07 | 1976-12-07 | Ab Tellusond | Apparatus for continuous liquid-liquid extraction of water with a solvent |
US4132511A (en) * | 1975-11-10 | 1979-01-02 | Varian Associates, Inc. | Damper for high pressure pumping system |
US4134769A (en) * | 1976-08-10 | 1979-01-16 | Mitsubishi Paper Mills, Ltd. | Offset printing plate |
US4416548A (en) * | 1980-03-13 | 1983-11-22 | Sunds Defibrator Aktiebolag | Apparatus for gas or liquid admixture |
US4496245A (en) * | 1983-03-07 | 1985-01-29 | International Business Machines Corporation | Liquid chromatography proportioning valve and mixer |
EP0124795A2 (en) | 1983-04-11 | 1984-11-14 | Fuji Photo Film Co., Ltd. | Silver halide photographic emulsion |
US4832991A (en) * | 1987-11-03 | 1989-05-23 | Eastman Kodak Company | Coating process |
US5061079A (en) * | 1989-03-10 | 1991-10-29 | Satake Chemical Equipment Mfg., Ltd. | Stirrer |
US5141327A (en) * | 1989-03-10 | 1992-08-25 | Satake Chemical Equipment Mfg., Ltd. | Stirrer |
US5202218A (en) * | 1990-03-23 | 1993-04-13 | Mitsubishi Paper Mills Limited | Scanning exposing type lithographic printing plate with 1.5 wt. % of water or less |
US5445913A (en) * | 1994-02-25 | 1995-08-29 | Eastman Kodak Company | Process for the formation of heat image separation elements of improved sensitometry |
US5985535A (en) * | 1996-12-26 | 1999-11-16 | Fuji Photo Film Co., Ltd. | Method for producing silver halide emulsion and silver halide photographic emulsion |
US6022681A (en) * | 1997-04-18 | 2000-02-08 | Fuji Photo Film Co., Ltd. | Method for producing tabular silver halide grain emulsion |
US6109780A (en) * | 1998-01-22 | 2000-08-29 | S. P. Industries Inc. | Dynamic vortex impeller |
US20040114462A1 (en) * | 2001-03-08 | 2004-06-17 | Schunk Stephan Andreas | Process and devices for homogeneously mixing a solid phase which is present in finely dispersed state with a fluid |
US20030103852A1 (en) * | 2001-12-04 | 2003-06-05 | Levitronix Llc | Dispensing apparatus for a fluid |
US20050226746A1 (en) * | 2001-12-04 | 2005-10-13 | Levitronix Llc | Dispensing apparatus for a fluid |
US20090219780A1 (en) * | 2005-10-04 | 2009-09-03 | Jose Castillo | Mixing System Including a Flexible Bag, Specific Flexible Bag and Locating System for the Mixing System |
US8282267B2 (en) * | 2006-10-03 | 2012-10-09 | Artelis S.A. | Mixing system including a flexible bag, specific flexible bag and locating system for the mixing system |
US20080310253A1 (en) * | 2007-06-18 | 2008-12-18 | Asahi Sunac Corporation | Multi-component mixing apparatus |
Also Published As
Publication number | Publication date |
---|---|
GB847143A (en) | 1960-09-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2912343A (en) | Production of photographic material | |
US2054390A (en) | Photographic bleachjng-out layers | |
US2318788A (en) | Incorporation of couplers in nongelatin emulsions | |
US1879537A (en) | Anti-halation layers for photographic material | |
JPH0194301A (en) | Color mosaic filter | |
US2403721A (en) | Preventing color fog in photographic material | |
US2304939A (en) | Multilayer photographic material containing color formers | |
EP0297804B1 (en) | Silver halide photographic light-sensitive material | |
US3488193A (en) | Silver halide emulsions containing naphthol color couplers | |
US2689793A (en) | Controlling grain and contrast in color photography | |
US3189452A (en) | Color-forming photographic process utilizing a bleach-fix followed by a bleach | |
US3342592A (en) | Photographic color films and processes | |
US2742832A (en) | Controlling grain and contrast in color photography | |
US2384598A (en) | Photographic material | |
US2592243A (en) | Method of selectively exposing the grains of a mixed grain photographic emulsion | |
US2618553A (en) | Hardened particle mixed grain photographic emulsion | |
US2196734A (en) | Colored photographic image from hydrazine compounds | |
US2078398A (en) | Photographic material having aldehyde screening dyes | |
US2186733A (en) | Color photography | |
JPS6232459A (en) | Silver halide color photographic sensitive material | |
US2220187A (en) | Filter layer for photographic color films and plates | |
US2358169A (en) | Photographic printing material | |
US2251365A (en) | Photographic sensitive material | |
SU120127A1 (en) | Method for sensitization of halosilver emulsions | |
US1918208A (en) | Method of making films for natural color reception |