US2682464A - Method of packaging and stabilizing single-powder developers - Google Patents
Method of packaging and stabilizing single-powder developers Download PDFInfo
- Publication number
- US2682464A US2682464A US295782A US29578252A US2682464A US 2682464 A US2682464 A US 2682464A US 295782 A US295782 A US 295782A US 29578252 A US29578252 A US 29578252A US 2682464 A US2682464 A US 2682464A
- Authority
- US
- United States
- Prior art keywords
- powder
- developer
- stabilizing
- boric anhydride
- packaging
- 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
- 239000000843 powder Substances 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 21
- 230000000087 stabilizing effect Effects 0.000 title claims description 18
- 238000004806 packaging method and process Methods 0.000 title claims description 14
- 239000000203 mixture Substances 0.000 claims description 30
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- -1 SILVER HALIDE Chemical class 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims 1
- 239000003513 alkali Substances 0.000 description 12
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 6
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 6
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 6
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 5
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229940079877 pyrogallol Drugs 0.000 description 3
- CYXJEHCKVOQFOV-UHFFFAOYSA-N (4-amino-2-methylphenyl) hydrogen sulfate Chemical compound CC1=CC(N)=CC=C1OS(O)(=O)=O CYXJEHCKVOQFOV-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 229940001593 sodium carbonate Drugs 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RVGOBWDGAVAVPJ-UHFFFAOYSA-N (4-hydroxyphenyl)azanium;chloride Chemical compound Cl.NC1=CC=C(O)C=C1 RVGOBWDGAVAVPJ-UHFFFAOYSA-N 0.000 description 1
- PCAXITAPTVOLGL-UHFFFAOYSA-N 2,3-diaminophenol Chemical compound NC1=CC=CC(O)=C1N PCAXITAPTVOLGL-UHFFFAOYSA-N 0.000 description 1
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 description 1
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 241001397173 Kali <angiosperm> Species 0.000 description 1
- WRUZLCLJULHLEY-UHFFFAOYSA-N N-(p-hydroxyphenyl)glycine Chemical compound OC(=O)CNC1=CC=C(O)C=C1 WRUZLCLJULHLEY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- NAYYNDKKHOIIOD-UHFFFAOYSA-N phthalamide Chemical compound NC(=O)C1=CC=CC=C1C(N)=O NAYYNDKKHOIIOD-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Inorganic materials [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- NVBFHJWHLNUMCV-UHFFFAOYSA-N sulfamide Chemical compound NS(N)(=O)=O NVBFHJWHLNUMCV-UHFFFAOYSA-N 0.000 description 1
- 230000002277 temperature effect Effects 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
- G03C5/267—Packaging; Storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S220/00—Receptacles
- Y10S220/917—Corrosion resistant container
Definitions
- This invention relates to single-powder photographic developers, and more particularly to a method of' packaging and stabilizing the singie-powder mixture to prevent disadvantageous interaction between the organic developer component and the basic component of the ⁇ singlepowder mixture.
- Single-powder developer mixtures may ⁇ contain an organic developer component or mixtures of such components, including monomethyllo 2,605,118 of August 5, 1952, the effective and imparaaminophenol sulfate (elon or metol), hyproved stabilization of single-powder photodroquinone, p-aminophenol hydrochloride, pgraphic developers is accomplished by intimateaminophenol sulfate, pyrogallol, parahydroxyly mixing boric anhydride With the other comphenyl glycine, catechol, diaminophenol hydroponents of the single-,powder developer mixture.
- an organic developer component or mixtures of such components including monomethyllo 2,605,118 of August 5, 1952, the effective and imparaaminophenol sulfate (elon or metol), hyproved stabilization of single-powder photodroquinone, p-aminophenol hydrochloride, pgraphic developers is accomplished by intimate
- the alkali of single-powder photographic developers withcomponent may be the stable hydrate of an alout actually incorporating the boric anhydride kali carbonate, a desiccated alkali carbonate, an stabilizer into the mixture. alkali metaborate, or analkali suliite.
- the stable alkali carbonate monohydrate is subsequently a novel method of stabilizing single-powder ferred.
- nc-vel component may be potassium bromide or iodide.
- the latter has outtographic developers as well as a novel method standing stabilizing properties in the presence for packaging such powders in a novel package.
- of either sodium carbonate or borax and has We have found that instead of incorporating been employed considerably more than the other the powdered boric anhydride as the stabilizing stabilizers mentioned in that patent.
- phthalic anhydride in single-powder developer mixtures, which contain alkali carbonates and suli'ite, is that phthalic anhydride may react, due in part to temperature effects with these basic substances and forni gas under suiicient pressure to distend the hermetically sealed can in which the developer powder is packaged, and often cause a portion of the powder to be ejected with some violence as the package is opened.
- the container is cooled to normal temperatures to set the coating.
- the single-powder photographic developer is then added to the container and the cover sealed thereon in accordance with the usual practice in this art.
- An amount of boric anhydride up to of thetotal weight of the other constituents may be employed effectively. No particular advantage is found when a larger amount is employed.
- Example 1 A metal can was heated to 577 C. and 4.2 grams of -boric anhydride was sprinkled over the interior surface of the can. The hot can caused the boric anhydride to become lmolten and ow in a thin coating over the inner surface of the can. The can was then cooled to room temperature and the fused coating adhered thereto.
- a thoroughly mixed single-powder photographic developer composition comprising:
- Example 2 A glass bottle was heated to 557 C. and the inner surface sprinkled with 2.2 grams of boric anhydride which became fused to the can surface. After cooling to room temperature a thoroughly mixed single-powder photographic f developer composition comprising:
- Example 3 A glass bottle was heated to 577 C. and a coating of 2.9 grams of fused boric anhydride formed thereon as explained herein.
- the bottle was sealed and exposed to a temperature of F. for ten hours.
- the single-powder was then employed in a, developing process and was found to be unchanged and to have undiminished developing properties.
- a 4check sample in an uncoated bottle showed evidence of deterioration under similar treatment.
- compositions of the above examples should be dissolved in water to make one liter of solution.
- the method of stabilizing a single-powder photographic developer composition containing an organic silver halide developer, an alkali carbonate, and an alkali sulfte which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
- the method of stabilizing a single-powder photographic developer composition containing monomethyl p-'aminophenol sulfate, hydroquincne, anhydrous sodium sulte, sodium carbonate monohydrate and ⁇ potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
- the method of stabilizing a single-powder photographic developer composition containing monomethyl p-aminophenol sulfate, hydroquinone, anhydrous sodium sulflte and potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
- the method of stabilizing a single-powder photographic developer composition containing pyrogallol, sodium sulte, sodium carbonate monohydrate and potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Packages (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
June 29, 1954 E. s. wnTALA ETAL 2,682,464
METHOD OF PACKAGING AND STABILIZING SINGLE-POWDER. DEVELOPERS Filed June 26, 1952 SINGLE POWDER PHOTGAPH/C DEI/LOPER Edwin S. Wiz' fala DonaldJKridel INVENToRs ATTORNE YS UNITED STATE TENT OFFICE METHOD OF PACKAGING AND STABILIZING SINGLE-POWDER DEVELOPERS Edwin S. Wiitala and Donald J. Kridel, Rochester, N. Y., assignors to Eastman Kodak Company, Rochester, N. Y., a corporation of `New Jersey Application June `26, 1952, Serial No. 295,782
6 Claims. (Cl. 95-88) This invention relates to single-powder photographic developers, and more particularly to a method of' packaging and stabilizing the singie-powder mixture to prevent disadvantageous interaction between the organic developer component and the basic component of the` singlepowder mixture.
Single-powder developer mixtures may `contain an organic developer component or mixtures of such components, including monomethyllo 2,605,118 of August 5, 1952, the effective and imparaaminophenol sulfate (elon or metol), hyproved stabilization of single-powder photodroquinone, p-aminophenol hydrochloride, pgraphic developers is accomplished by intimateaminophenol sulfate, pyrogallol, parahydroxyly mixing boric anhydride With the other comphenyl glycine, catechol, diaminophenol hydroponents of the single-,powder developer mixture. chloride and others, with an alkali component, a We have now found a unique way of employstabilizing component, an oxidizing preventer ing boric anhydride to stabilize the same type andan anti-fogging component. The alkali of single-powder photographic developers withcomponent may be the stable hydrate of an alout actually incorporating the boric anhydride kali carbonate, a desiccated alkali carbonate, an stabilizer into the mixture. alkali metaborate, or analkali suliite. Generally An object, therefore, of the present invention the stable alkali carbonate monohydrate is preis a novel method of stabilizing single-powder ferred. The oxidation preventing` component photographic developers with boric anhydride. may be an alkali sulte, and the anti-fogging Another object of this invention is a nc-vel component may be potassium bromide or iodide. method of packaging and a novel package for Stabilizing components for such a single-powder single-powder photographic developers. developer are disclosed in Patent 2,384,592 of Other objects will appear hereinafter. September l1, 1945, and include maleic anhy- In accordance with the present invention we dride, salicylic acid, alkali metabisulte, benzoic have found an alternative method of employing anhydride, orthobenzoic sulfamide, phthalamide boric anhydride to stabilize single-powder phoand phthalic anhydride. The latter has outtographic developers as well as a novel method standing stabilizing properties in the presence for packaging such powders in a novel package. of either sodium carbonate or borax and has We have found that instead of incorporating been employed considerably more than the other the powdered boric anhydride as the stabilizing stabilizers mentioned in that patent. component into thephotographic developer rnix- While the stabilizing effect of the phthalic anture, the same beneficial stabilizing eiect may hydride is very good, it has been employed most be achieved by fusingl an equivalent amount of successfully in developer compositions having as boric anhydride onto the inside of the container the Valkali component either sodium carbonate in which the single-powder developer is to be or. sodium suli'lte, or mixtures thereof. Less subsequently packaged. This is a surprising dissuccesc has been attained in the case of the 40 coveryand although the theory of its operation lfl'QOltlt CllSS 0f develODSlS Containing sodium is not completely understood it nevertheless is meahorate as the alkali ingredient- AISO, the an effective method for preserving single-powder presence of phthalic anhydride in the Singledevelopers against self-deterioration. powder developer involves other considerations our method may be employed with glass and which are not too desirable. metal containers and with plastic or other types In the irst place, phthalic anhydride is slowly soluble in water. Furthermore, it is impossible to employ it in the presence of benzotriazole, the latter being a desirable component of certain developer mixtures. But the greatest disadvantage of employing phthalic anhydride in single-powder developer mixtures, which contain alkali carbonates and suli'ite, is that phthalic anhydride may react, due in part to temperature effects with these basic substances and forni gas under suiicient pressure to distend the hermetically sealed can in which the developer powder is packaged, and often cause a portion of the powder to be ejected with some violence as the package is opened.
ln the. copending application by William J. Rogers, Serial No. 210,284, filed February 9, 1951, entitled stabilizing Agent for Single Powder Photographie Developers now U. S. Patent of containers which will withstand the heat necessary to fuse the boric anhydride. An effective procedure to fuse the boric anhydride onto the inner surfaces of the container, is to dust the desired amount onto the inner surfaces of the container which has been heated somewhat above the fusing temperature of the boric anhydride. The fused coating may, however, be formed by placing the boric anhydride on the surface and subsequently heating the container to the fusing temperature, or by flowing molten boric anhydride onto the surfaces to be coated. As soon as the fusion takes place, or the surface is coated with the molten substance, the container is cooled to normal temperatures to set the coating. The single-powder photographic developer is then added to the container and the cover sealed thereon in accordance with the usual practice in this art. An amount of boric anhydride up to of thetotal weight of the other constituents may be employed effectively. No particular advantage is found when a larger amount is employed.
The following examples will serve further to illustrate the method of packaging and stabilizing single-powder developer mixtures according to our invention:
Example 1 A metal can was heated to 577 C. and 4.2 grams of -boric anhydride was sprinkled over the interior surface of the can. The hot can caused the boric anhydride to become lmolten and ow in a thin coating over the inner surface of the can. The can was then cooled to room temperature and the fused coating adhered thereto.
A thoroughly mixed single-powder photographic developer composition comprising:
Grams Elon (monomethyl p-amino phenol sulfate) 5.1 Anhydrous sodium sulte 45.0 Hydroquinone 12.0 Sodium carbonate monohydrate 81.3 Potassium bromide 1.9
Example 2 A glass bottle was heated to 557 C. and the inner surface sprinkled with 2.2 grams of boric anhydride which became fused to the can surface. After cooling to room temperature a thoroughly mixed single-powder photographic f developer composition comprising:
Grams Sodium sulte 50 Sodium carbonate monohydrate 54 Potassium bromide 1 Pyrogallol 6.4
was placed in the coated bottle and sealed therein. On exposure to extremes of temperature in the vicinity of 100 F. it was found that the boric anhydride effectively stabilized the single-powder against disadvantageous chemical reaction. The powder then was used successfully as a developer. A check sample stored in an untreated bottle was very badly deteriorated.
Example 3 A glass bottle was heated to 577 C. and a coating of 2.9 grams of fused boric anhydride formed thereon as explained herein.
To the cold bottle was added a single-powder photographic developer composition containing:
Sodium carbonate monohydrate 54.0 Potassium bromide 1.0
The bottle was sealed and exposed to a temperature of F. for ten hours. The single-powder was then employed in a, developing process and was found to be unchanged and to have undiminished developing properties. A 4check sample in an uncoated bottle showed evidence of deterioration under similar treatment.
In preparing a developer solution, the compositions of the above examples should be dissolved in water to make one liter of solution.
In the accompanying drawing there is sho-wn an elevation View in section of a container comprising a body l0 and a tight fitting cover H. The inner walls of the container have a coating l2 of fused boric anhydride thereon. A singlepo'wder photographic developer is shown as I3.
By our novel process the advantages of employing a boric anhydride stabilizer actually mixed in the single-powder developer as shown in Patent 2,606,118, supra, can be attained by merely coating the inside of the container with a fused boric lanhydride coating. This unexpected discovery permits single-powder mixtures having highly reactive ingredients to be stabilized against reaction without actually mixing the boric anhydride stabilizer throughout the powder.
We claim:
1. The method of stabilizing a single-powder photographic developer composition containing an organic silver halide developer and a photographically compatible basic ingredient selected from the group consisting of alkali sulfit-es and carbonates which comp-rises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
2. The method of stabilizing a single-powder photographic developer composition containing an organic silver halide developer, an alkali carbonate, and an alkali sulfte which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
3. The method of stabilizing a single-powder photographic developer composition containing monomethyl p-'aminophenol sulfate, hydroquincne, anhydrous sodium sulte, sodium carbonate monohydrate and `potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
4. The method of stabilizing a single-powder photographic developer composition containing monomethyl p-aminophenol sulfate, hydroquinone, anhydrous sodium sulflte and potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
5. The method of stabilizing a single-powder photographic developer composition containing pyrogallol, sodium sulte, sodium carbonate monohydrate and potassium bromide which comprises packaging the developer composition in a closed container having a coating on the interior surface thereof of fused boric anhydride.
6. The method of stabilizing a single-powder References Cited in the le of this patent photographic developer composition containing UNITED STATES PATENTS parahydroxy phenyl glycine, sodium sulte, sodium carbonate monohydrate and potassium Number Name Date bromide which comprises packaging the developer 5 11591399 Walker July 5, 1926 composition in a closed container having a ooat- 2,058,250 Nltafldy OC- 20: 1936 ing on the interior surface thereof of boric 2:6061118 Rogers Aug 5 1952 anhydride- OTHER REFERENCES lo Mellor, "Comprehensive Treatise on Inorganic and Theoretical Chemistry, Vo1.'5, 1924, page 41.
Claims (1)
1. THE METHOD OF STABILIZING A SINGLE-POWDER PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING AN ORGANIC SILVER HALIDE DEVELOPER AND A PHOTOGRAPHICALLY COMPATIBLE BASIC INGREDIENT SELECTED FROM THE GROUP CONSISTING OF ALKALI SULFITES AND CARBONATES WHICH COMPRISES PACKAGING THE DEVELOPER COMPOSITION IN A CLOSED CONTAINER HAVING A COATING ON THE INTERIOR SURFACE THEREOF OF FUSED BORIC ANHYDRIDE.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US295782A US2682464A (en) | 1952-06-26 | 1952-06-26 | Method of packaging and stabilizing single-powder developers |
| GB17749/53A GB731407A (en) | 1952-06-26 | 1953-06-26 | Improvements in single-powder photographic developers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US295782A US2682464A (en) | 1952-06-26 | 1952-06-26 | Method of packaging and stabilizing single-powder developers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2682464A true US2682464A (en) | 1954-06-29 |
Family
ID=23139212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US295782A Expired - Lifetime US2682464A (en) | 1952-06-26 | 1952-06-26 | Method of packaging and stabilizing single-powder developers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2682464A (en) |
| GB (1) | GB731407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3236650A (en) * | 1962-09-06 | 1966-02-22 | Limberger Walter | Method for developing films |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4816384A (en) * | 1986-10-09 | 1989-03-28 | E. I. Du Pont De Nemours And Company | Powdered packaged developer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1591899A (en) * | 1924-04-16 | 1926-07-06 | Pacific R & H Chemical Corp | Stabilization of liquid hydrocyanic acid |
| US2058250A (en) * | 1936-10-20 | Treatment and packaging of ether | ||
| US2606118A (en) * | 1951-02-09 | 1952-08-05 | Eastman Kodak Co | Stabilizing agent for single powder photographic developers |
-
1952
- 1952-06-26 US US295782A patent/US2682464A/en not_active Expired - Lifetime
-
1953
- 1953-06-26 GB GB17749/53A patent/GB731407A/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2058250A (en) * | 1936-10-20 | Treatment and packaging of ether | ||
| US1591899A (en) * | 1924-04-16 | 1926-07-06 | Pacific R & H Chemical Corp | Stabilization of liquid hydrocyanic acid |
| US2606118A (en) * | 1951-02-09 | 1952-08-05 | Eastman Kodak Co | Stabilizing agent for single powder photographic developers |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3236650A (en) * | 1962-09-06 | 1966-02-22 | Limberger Walter | Method for developing films |
Also Published As
| Publication number | Publication date |
|---|---|
| GB731407A (en) | 1955-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1316034C (en) | Powdered packaged developer and a process of preparation | |
| US2196901A (en) | Photographic developer | |
| JPS61259921A (en) | Method of manufacturing package containing mutually reactivegranular substance and package containing said substance | |
| US2606118A (en) | Stabilizing agent for single powder photographic developers | |
| US2902367A (en) | Photographic developer antioxidant | |
| US2682464A (en) | Method of packaging and stabilizing single-powder developers | |
| US2682465A (en) | Method of packaging and stabilizing single-powder developers | |
| US2649376A (en) | Single powder developers containing stabilized alkali hydroxides | |
| JPS58111032A (en) | Developing composition | |
| US3814606A (en) | Color photographic processing composition | |
| US2666702A (en) | Single powder photographic developers having improved stability to high temperatures | |
| US2313523A (en) | Photographic material | |
| US2685513A (en) | Method of stabilizing hydrates of sodium metaborate and single powder photographic developers containing same | |
| US2893865A (en) | Single powder photographic developers | |
| US2843484A (en) | Alkalies for single powder photographic developers | |
| US1976299A (en) | Photographic developer | |
| US2739894A (en) | Single powder photographic developers containing lithium hydroxide | |
| US2846308A (en) | Alkali hydroxides for use in single-powder photographic developers | |
| US2592366A (en) | Noncaking photographic acid fixing powders | |
| US3713826A (en) | Sulfite esters as preservatives for black and white developing agents | |
| US2915394A (en) | Stabilizer for single powder photographic developer | |
| US2688547A (en) | Single powder developers having improved physical characteristics and method of forming the same | |
| US5900355A (en) | Method of making uniformly mixed dry photographic processing composition using hot melt binder | |
| US2666703A (en) | Single-powder photographic developers stabilized with metaboric acid | |
| US2923625A (en) | Method of producing diazotype prints |