US2105274A - Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof - Google Patents

Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof Download PDF

Info

Publication number
US2105274A
US2105274A US109792A US10979236A US2105274A US 2105274 A US2105274 A US 2105274A US 109792 A US109792 A US 109792A US 10979236 A US10979236 A US 10979236A US 2105274 A US2105274 A US 2105274A
Authority
US
United States
Prior art keywords
iodonium
yellow stain
preventing yellow
photographic
regulation
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
Application number
US109792A
Inventor
Steigmann Albert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felix Sager & Dr Gossler GmbH
Original Assignee
Felix Sager & Dr Gossler GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felix Sager & Dr Gossler GmbH filed Critical Felix Sager & Dr Gossler GmbH
Application granted granted Critical
Publication of US2105274A publication Critical patent/US2105274A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/305—Additives other than developers
    • 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
    • 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
    • G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression

Definitions

  • Thisinvention relates to a product and process of preventing yellow stain in photographic prepof thallium salts has a tendency to iorm fog in,
  • iodonium compounds have all the good properties of the thallium salts when used in photographic solutions and they also act to prevent fog and particularly yellow stain, while at the same time, they do not interiere in the least with sensitivity and grada- Furthermore, the use of iodonium comcipitation of silver in the deepest blacks that are non-bronzing and which are free from reflection.
  • Ii iodonium salts in slight quantities are added after mixing, ripening and subsequent ripening'can be carried out at a constant low content oi halogen ions. Also, when iodonium .compounds'are added after ripening, or to the wash water, washing out can be eflected at a constant .low content of halogen ions, whereby considerable inequalities in washing out the halogen ions in the'outer layers can be avoided.
  • iodonium compounds to a developer also prevents the troublesome con 1 centra't ion of potassium bromide or iodide. Similarly such addition to the'fixing bath prevents concentration of iodine ions .which delays fixing. Furthermore the addition of iodonium compounds to fixing baths which .have been desilverized and used serves to regenerate the baths so that they may be used again. addition to the aforementioned desirable properties being secured in emulsions and developers by the use of iodonium compounds therein,
  • these compounds have a marked anti-fog effect when added thereto.
  • This anti-fog efiect is present even when the iodonium. compounds are added to other than the emulsion, as for example to the protective layer, the backing or even to the paper support for the emulsion.
  • Example 1 least tendency to form yellow stain even during prolonged development.
  • Example 2 formation of bromine and iodine ions which in- 1 teriere with development is prevented, as these ions precipitate as difli'cultly soluble diphenyl iodonium bromide or iodide. If necessary, the amount of iodonium compound can be increased according to the quantity of potassium bromide and iodide formed.
  • I claim: 1. The method of preventing yellow stain and regulating the halogen-ions in light sensitive silver halide emulsions, which consists in treata ing said emulsions with a solution containing a soluble iodonium compound.
  • The' method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensitive silver halide layer is a solution containing a developing agent and a soluble iodonium compound.
  • the method of preventing yellow stain and regulating'the halogen ions in developers which consists in adding iodosobenzene to a solution containing a developing agent capable of developing silver halide, said iodosobenzene disintegrating in the cold into iodoxybenzene and iodobenzene, these two products reacting to form a diphenyl-iodonium compound, and developing an exposed light sensitive silver halide layer in said solution.
  • the method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensi- Y tive'silver halide layer in a solution containing a developing agent and diphenyl-iodonium nitrate.
  • a photographic light sensitive element comprising silver halide emulsiomand a soluble .iodonium compound therein for preventing yellow stain. 4
  • a photographic developer comprising a developing agent capable of developing a silver halide image, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.
  • a photographic fixing bath comprising a silver halide solvent, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

tion.
pounds, during developing brings about a pre- Patented Jan. 11, 1938 PATENT OFFICE rnocnss or PREVENTING YELLOW s'ranw IN rno'roonarmc PREPARATIONS AND REGULATION OF TENT THEREOF THE HALOGEN CON- Albert Steigmann, Lnxemburg-Ville, Luxemburz,
asaignor to Felix Sager & Dr. Gossler Gesellscliatt mit beschriinkter ,Haftnng, Heidelberg, Germany, a firm of Germany No nmwing. Application November '1, 1936, Se-
rial No. 109,792. In Germany December 13,
14 Claims.
Thisinvention relates to a product and process of preventing yellow stain in photographic prepof thallium salts has a tendency to iorm fog in,
photographic emulsions which is undesirable.
I have discovered that iodonium compounds have all the good properties of the thallium salts when used in photographic solutions and they also act to prevent fog and particularly yellow stain, while at the same time, they do not interiere in the least with sensitivity and grada- Furthermore, the use of iodonium comcipitation of silver in the deepest blacks that are non-bronzing and which are free from reflection.
I have found that the use of suitable iodonium salts such as diphenyl iodonium nitrate or acetate in photographic preparations makes it possible to keep the content of halogen ions at a constant value corresponding to the solubility of the iodonium halides in the particular solution. In this manner, an excess of halogen ions in the production of photographic emulsions is prevented from the start, which is of considerable importance in'the preparation of, for example, silver iodide emulsions. The influence upon the formation oithe grain is also important. Ii iodonium salts in slight quantities are added after mixing, ripening and subsequent ripening'can be carried out at a constant low content oi halogen ions. Also, when iodonium .compounds'are added after ripening, or to the wash water, washing out can be eflected at a constant .low content of halogen ions, whereby considerable inequalities in washing out the halogen ions in the'outer layers can be avoided.
The addition of these iodonium compounds to a developer also prevents the troublesome con 1 centra't ion of potassium bromide or iodide. Similarly such addition to the'fixing bath prevents concentration of iodine ions .which delays fixing. Furthermore the addition of iodonium compounds to fixing baths which .have been desilverized and used serves to regenerate the baths so that they may be used again. addition to the aforementioned desirable properties being secured in emulsions and developers by the use of iodonium compounds therein,
these compounds have a marked anti-fog effect when added thereto. This anti-fog efiect is present even when the iodonium. compounds are added to other than the emulsion, as for example to the protective layer, the backing or even to the paper support for the emulsion.
Furthermore I have found that all of the aforementioned advantages can be secured by the addition of other compounds which, due to decomposition and/or mutual reaction of the decomposition products produce iodonium compounds. As an example of such other compound, I find that iodosobenzene, in the cold, disintegrates into iodoxybenzene and iodobenzene and these two products react to form the diphenyl iodonium compound in the developer.
' The following are two examples of practicing I my invention:
Example 1 least tendency to form yellow stain even during prolonged development.
Example 2 formation of bromine and iodine ions which in- 1 teriere with development is prevented, as these ions precipitate as difli'cultly soluble diphenyl iodonium bromide or iodide. If necessary, the amount of iodonium compound can be increased according to the quantity of potassium bromide and iodide formed.
I claim: 1. The method of preventing yellow stain and regulating the halogen-ions in light sensitive silver halide emulsions, which consists in treata ing said emulsions with a solution containing a soluble iodonium compound.
2. The method'of preventing yellow stainand regulating the halogen ions in light sensitive silver halide emulsions which consists in adding a soluble iodonium compound thereto.
3. The method of preventing yellow stain and regulating the halogen ions in light sensitive silver halide emulsions which consists in, adding thereto diphenyl-iodonium nitrate.
4. The method oi'preventing yellow stain and.
regulating the halogen ions in light sensitive silver halide emulsions which consists in. addi thereto diphenyl-iodonium acetate.
5. The' method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensitive silver halide layer is a solution containing a developing agent and a soluble iodonium compound.
6. The method of preventing yellow stain and regulating'the halogen ions in developers which consists in adding iodosobenzene to a solution containing a developing agent capable of developing silver halide, said iodosobenzene disintegrating in the cold into iodoxybenzene and iodobenzene, these two products reacting to form a diphenyl-iodonium compound, and developing an exposed light sensitive silver halide layer in said solution.
'7. The method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensi- Y tive'silver halide layer in a solution containing a developing agent and diphenyl-iodonium nitrate.
8. The method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensitive silver halide layer in a solution containing a developing agent and diphenyl-iodonium acetate.
9. The method of preventing yellow stain and regulating the halogen ions in fixing baths which consists in treating an exposed and developed photographic element in a solution containing a silver halide solvent and a soluble iodonium compound.
10. The method of preventing yellow stain and regulating the halogen ions in flxing baths which consists in treating an exposed and developed photographic element in a solution containing a silver halide solvent and diphenyl-iodonium acetate.
12. A photographic light sensitive element comprising silver halide emulsiomand a soluble .iodonium compound therein for preventing yellow stain. 4
13. A photographic developer comprising a developing agent capable of developing a silver halide image, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.
14. A photographic fixing bath comprising a silver halide solvent, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.
ALBERT STEIGMANN.
US109792A 1935-12-13 1936-11-07 Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof Expired - Lifetime US2105274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0120831 1935-12-13

Publications (1)

Publication Number Publication Date
US2105274A true US2105274A (en) 1938-01-11

Family

ID=7535343

Family Applications (1)

Application Number Title Priority Date Filing Date
US109792A Expired - Lifetime US2105274A (en) 1935-12-13 1936-11-07 Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof

Country Status (3)

Country Link
US (1) US2105274A (en)
BE (1) BE436891A (en)
FR (1) FR809623A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561166A (en) * 1948-12-01 1951-07-17 Gen Aniline & Film Corp Thallium salts in photographic color developers
US2572903A (en) * 1944-06-22 1951-10-30 Gen Aniline & Film Corp Photographic developer containing thallium salts
US2628167A (en) * 1948-04-29 1953-02-10 Du Pont Method of making colloid silver halide emulsions containing thallium
US3928043A (en) * 1973-11-16 1975-12-23 Eastman Kodak Co Photographic elements containing iodoso or iodoxy oxidants
US5605789A (en) * 1994-12-22 1997-02-25 Eastman Kodak Company Iodochloride emulsions containing iodonium salts having high sensitivity and low fog
EP0768568A3 (en) * 1995-10-13 1997-05-14 Konica Corporation Silver halide photographic light-sensitive material
US5714311A (en) * 1997-01-08 1998-02-03 Eastman Kodak Company Thermally processable imaging element comprising aryliodonium compounds
US5733717A (en) * 1997-01-08 1998-03-31 Eastman Kodak Company Silver halide photographic elements containing aryliodonium compounds
US5750324A (en) * 1997-01-08 1998-05-12 Eastman Kodak Company High chloride emulsions with improved reciprocity

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572903A (en) * 1944-06-22 1951-10-30 Gen Aniline & Film Corp Photographic developer containing thallium salts
US2628167A (en) * 1948-04-29 1953-02-10 Du Pont Method of making colloid silver halide emulsions containing thallium
US2561166A (en) * 1948-12-01 1951-07-17 Gen Aniline & Film Corp Thallium salts in photographic color developers
US3928043A (en) * 1973-11-16 1975-12-23 Eastman Kodak Co Photographic elements containing iodoso or iodoxy oxidants
US5605789A (en) * 1994-12-22 1997-02-25 Eastman Kodak Company Iodochloride emulsions containing iodonium salts having high sensitivity and low fog
EP0768568A3 (en) * 1995-10-13 1997-05-14 Konica Corporation Silver halide photographic light-sensitive material
US5851753A (en) * 1995-10-13 1998-12-22 Konica Corporation Silver halide photographic light-sensitive material
US5714311A (en) * 1997-01-08 1998-02-03 Eastman Kodak Company Thermally processable imaging element comprising aryliodonium compounds
US5733717A (en) * 1997-01-08 1998-03-31 Eastman Kodak Company Silver halide photographic elements containing aryliodonium compounds
US5750324A (en) * 1997-01-08 1998-05-12 Eastman Kodak Company High chloride emulsions with improved reciprocity

Also Published As

Publication number Publication date
FR809623A (en) 1937-03-08
BE436891A (en)

Similar Documents

Publication Publication Date Title
US2592250A (en) Photographic silver bromide emulsion containing some silver iodide
US2487850A (en) Chemical sensitization of photographic emulsions
US2105274A (en) Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof
US3748138A (en) Metal complex in silver halide development
US2066099A (en) Photographic emulsion
US2310223A (en) Liquid hardener solution
US2875049A (en) Stabilized photographic developers for color photography
US3565632A (en) Hardening of gelatin
US2238632A (en) Yellow fog inhibitor for photographic materials
US2005837A (en) Manufacture of photographic emulsions
US2339309A (en) Photographic reducing composition and process
US3466173A (en) Silver halide element containing a developer and aromatic sulfinic acid stabilizers
US3804629A (en) Process for the production of a stain-resistant photographic silver halide emulsion
US3372031A (en) Direct positive silver halide element with contiguous colloid layer containing developing agent
US2937945A (en) Process and photographic material for the direct production of positive photographicimages
EP0220052A2 (en) Silver halide color photographic light-sensitive material
US3226231A (en) Fog reduction in silver halide emulsions with 3-mercaptobenzoic acid
US2743183A (en) Chemical sensitization of photographic emulsions
US3854948A (en) New development composition for radiographic film
US3761262A (en) Photographic color developing process
US3664838A (en) Treatment of and developing composition for photographic light-sensitive materials
US3458316A (en) Light sensitive silver halide emulsions
US3396022A (en) Quinone stabilizers and antifoggants for silver halide emulsions
US2500140A (en) Sensitive photographic materials
US2575002A (en) Latent image intensification