DE730212C - Process for the desensitizing and fog-free development of photographic silver halide emulsions - Google Patents

Process for the desensitizing and fog-free development of photographic silver halide emulsions

Info

Publication number
DE730212C
DE730212C DEI69314D DEI0069314D DE730212C DE 730212 C DE730212 C DE 730212C DE I69314 D DEI69314 D DE I69314D DE I0069314 D DEI0069314 D DE I0069314D DE 730212 C DE730212 C DE 730212C
Authority
DE
Germany
Prior art keywords
desensitizing
fog
silver halide
halide emulsions
photographic silver
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
Application number
DEI69314D
Other languages
German (de)
Inventor
Dr Emil Birr
Dr Hans Fricke
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI69314D priority Critical patent/DE730212C/en
Application granted granted Critical
Publication of DE730212C publication Critical patent/DE730212C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29Development processes or agents therefor
    • G03C5/305Additives other than developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

Verfahren zur desensibilisierenden und schleierfreien Entwicklung photographischer Halogensilberemulsionen Es ist bekannt, zur Klarhaltung photc>- #Iraphischcr Papiere aus CI)loTsilbcr sowohl wie Chlorbromsilber während der Entwick- lung Tlllo'sellllcarbazlde anzuwenden, die an mindestens zwei verschiedenen Sticks(off- atomen durch einwertige aliphatische oder aromatische Radikale substituiert sind. Diese an sich sehr günstig wirkenden Substanzen bewirken nicht in allen Fallen eine @@enüe ndc Klariialtunl#,. Es wurde gefunden. da13 111a11 eine tt-cscnt- lich verbesserte hlarhaltun- und @@@clisibili- sierung photographischer C'hlnrsillicr, Chlor- bromsilber- und auch 131'Ulll@lll)et-S('hl(.'1)I@°t1 im Entwickler erhält. \l'(°1111 mau an Stell(` des in t- oder =-Stcllun- stehenden =\lkvls oder Ar)-ls cincn mit einer oder melircrril ii(`tf:t- til-iercnden Gruppen (z. 13. \ itro. "/_N-an. I-Ia- I(>getl usw.) sttl)stlttiilrteil aromatischen Cal-- licrn- oder Sulfonsäurcrcst t-crtlcndet. .\ul>cr dem \'artcil der besseren lilarhaltutlg besitzen diese Substanzen gegenüber den eingangs er- wälintcn noch den wcitcren Vorzug dc'r besse- ren Löslichkeit. Als gcci-n(`tc` Substanzen 3elcil 11111r die folgenden genannt: 4-\Ictllyl- 2-in-nitr ol)cnzovlthiosemicarbazid. .f-äthyl- 2-p-nitrohenzolsi -Ifoativlthiosemicsirl)azid, 4-\Ic- tllvl-2(2', 3', <i -trichlorl)enzolstilfon"-1 ,-thiosemi- carbazid und 4-Methyl-2i t'-nitrolla1)litlialin- 5'-sulfc>livl j-tllioscinicarbazid. Die Verbin- dungen werden hergestellt aus den cntsl>rc-- chenden Aeidvllii-(lraznieii U11(1 Su'nfi>len. Die Substanzen werden in Mengen voll ct\\at o,01 his 0,2-- pro Liter Entwick1c#r an-e- wandt, ohne dtll-1 diese \Ir@i@@cnanahcn jedoch als Grenzen anzusehen sind. Es ist ztl-cck- nüil.@i, für jeden einzelnett Fall die opti- male Menge für den betreffenden Entwickler und die bctrcfendc Emulsion durch entspre- chende Versuche zu klären, da jeder Ent- Wickler und jede Emulsion verschieden stark auf diesen Zusatz ansprechen. Es ist daher möglich, daß man auch schon mit geringeren als den obengenannten Mengen .auskommcti kann. und andererseits kann es vorkommen, daß die angegebene Höchstmenge noch um ein Beträchtliches überschritten werden mul5, um die jeweils günstigste Wirkung zu et'-zielen.Process for the desensitizing and fog-free development of photographic silver halide emulsions It is known to keep photc> - #Iraphischcr papers from CI) loTsilbcr both like chlorobromide silver during development lung Tlllo'sellllcarbazlde apply that to at least two different sticks (off- atoms by monovalent aliphatic or aromatic radicals are substituted. These substances that have a very beneficial effect in themselves do not result in an @@ enüe ndc in all cases Klariialtunl # ,. It was found. da13 111a11 a tt-cscnt- Lich improved hlarhaltun- and @@@ clisibili- ization of photographic chemicals, chlorine bromsilber- and also 131'Ulll @ lll) et-S ('hl (.' 1) I @ ° t1 im Developer receives. \ l '(° 1111 mau instead of (`des in t or = position = \ lkvls or Ar) -ls cincn with a melircrril or ii (`tf: t- til-iercenden groups (e.g. 13. \ itro. "/ _N-an. I-Ia- I (> getl etc.) sttl) part of aromatic cal-- Licoric or sulphonic acid crust is t-crinted. . \ ul> cr the \ 'artcil of the better lilachaltlg own these substances compared to the initially Do you still want the weaker privilege of the better- ren solubility. As gcci-n (`tc` substances 3elcil 11111r called the following: 4- \ Ictllyl- 2-yn-nitrol) cnzovlthiosemicarbazid. .f-ethyl- 2-p-nitrohenzolsi -Ifoativlthiosemicsirl) azide, 4- \ Ic- tllvl-2 (2 ', 3', <i -trichlorl) enzolstilfon "-1, -thiosemi- carbazid and 4-methyl-2i t'-nitrolla1) litlialin- 5'-sulfc> livl j-tllioscinicarbazide. The connection connections are made from the cntsl> rc-- chenden Aeidvllii- (lraznieii U11 (1 Su'nfi> len. The substances are in quantities full ct \\ at 0.1 to 0.2-- per liter of development 1c # r an-e- turns without dtll-1 this \ Ir @ i @@ cnanahcn however are to be regarded as limits. It is ztl-cck- nüil. @ i, for each individual case the optimal male amount for the developer in question and the bctrcfendc emulsion by appropriate appropriate attempts to clarify, since every finding The curlers and each emulsion respond differently to this additive. It is therefore possible that smaller amounts than those mentioned above can be used. and on the other hand it can happen that the specified maximum amount still has to be exceeded by a considerable amount in order to achieve the most favorable effect in each case.

Die Substanzen können statt in den Entwickler auch in ein Entwicklervorbad oder in eine Gelatineschicht oder in eine andere Schicht des photographischen Materials eingebracht «erden, wenn sie daraus. im Entwickler bzw. im Vorbad herausgelöst werden und während der Entwicklung zugegen sind. Auch ein Zusatz zur Emulsion selbst oder ihren Ausgangsstoffen ist, wenn vorsichtig dosiert, möglich. Beim Zusatz zum Entwickler beträgt die Konzentration der «-irksamen Stoffe, xvie oben bereits angegeben, etwa o,oi bis 0,2 g pro Liter, bei Zusatz zu einem Torbad bis zu etwa t g pro Liter.The substances can also be used in a developer bath instead of in the developer or in a gelatin layer or in another layer of the photographic material brought in «when they come out of it. can be dissolved out in the developer or in the prebath and are present during development. Also an additive to the emulsion itself or its starting materials is possible if carefully dosed. When adding to the developer the concentration of the active substances, as already indicated above, is approximately o, oi to 0.2 g per liter, when added to a door bath up to about t g per liter.

Wenn die erfindungsgemäßen Substanzen dem photographischen Material einverleibt werden sollen, so geschieht dies nach den üblichen Verfahren der photographischen Industrie. Bei Einverleibung in eine Zwischen-, Rück- oder flberzugsschicht werden die Zusatzmengen so gewählt, daß sie o,oS bis 3 0-ö, berechnet auf das Trockengewicht der Gelatine, betragen. Bei photographischen Papieren können die Substanzen auch in die Papiermasse oder in die Barytage gebracht werden. Bei Einverleibung in die Papiermasse beträgt der Gehalt an wirksamer Substanz etwa o.o5 bis 5 0!o, berechnet auf den Trockengehalt des Papiers. Bei Einverleibung in die Barytschicht sind die Mengen etwa den oben für die Zwischenschichten usw. angegebenen gleich.When the substances according to the invention are used in the photographic material are to be incorporated, this is done according to the usual photographic processes Industry. When incorporated in an intermediate, backing or cover layer the additional amounts chosen so that they are o, oS to 3 0-ö, calculated on the dry weight the gelatin. In the case of photographic papers, the substances can also be brought into the paper pulp or into the bar days. When incorporated into the Paper pulp, the content of active substance is about o.o5 to 50! O, calculated on the dryness of the paper. When incorporated into the barite layer, they are Amounts about the same as those given above for the interlayers, etc.

Claims (1)

PATENTANSPRUCH: Verfahren zur desensibilisierenden und schleierfreien Entwicklung von Chlorsilber-, Bromsilber- oder Chlorbromsilberschichten, dadurch gekennzeichnet, daß während der Entwicklung Thiosemicarbazide oder deren Derivate zugegen sind, bei denen eins der an Stickstoff gebundenen Wasserstoffatome durch einen mit negativierenden Gruppen substituierten aromatischen Carbon- oder Sulfonsäurerest und ein oder mehrere Wasserstofatome der weiteren Stickstoffatome durch Alkyle oder Aryle substituiert sind.PATENT CLAIM: Process for desensitizing and haze-free Development of chlorosilver, bromosilver or chlorobromosilver layers, thereby characterized that thiosemicarbazides or their derivatives during development are present, in which one of the hydrogen atoms bonded to nitrogen through an aromatic carboxylic or sulfonic acid residue substituted with negative groups and one or more hydrogen atoms of the other nitrogen atoms by alkyls or Aryls are substituted.
DEI69314D 1941-04-05 1941-04-06 Process for the desensitizing and fog-free development of photographic silver halide emulsions Expired DE730212C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI69314D DE730212C (en) 1941-04-05 1941-04-06 Process for the desensitizing and fog-free development of photographic silver halide emulsions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEI0069314 1941-04-05
DEI69314D DE730212C (en) 1941-04-05 1941-04-06 Process for the desensitizing and fog-free development of photographic silver halide emulsions

Publications (1)

Publication Number Publication Date
DE730212C true DE730212C (en) 1943-01-08

Family

ID=25982158

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI69314D Expired DE730212C (en) 1941-04-05 1941-04-06 Process for the desensitizing and fog-free development of photographic silver halide emulsions

Country Status (1)

Country Link
DE (1) DE730212C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954476C (en) * 1950-04-18 1956-12-20 Gen Aniline & Film Corp Photographic film with increased sensitivity to the Hersol effect

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954476C (en) * 1950-04-18 1956-12-20 Gen Aniline & Film Corp Photographic film with increased sensitivity to the Hersol effect

Similar Documents

Publication Publication Date Title
DE973160C (en) Photographic material with a silver halide coating
DE966410C (en) Process for bleach-fixing silver photographic images
DE730212C (en) Process for the desensitizing and fog-free development of photographic silver halide emulsions
DE488148C (en) Process to increase the water resistance of diazotypes
DE1171266B (en) Stabilization of photographic emulsions
DE1282454B (en) Photographic developer solution
DE923891C (en) Process for developing photographic silver halide emulsions
DE486964C (en) Process for avoiding so-called white spots on photographic developing paper
DE403585C (en) Process for the production of developer-containing silver halide layers
DE705923C (en) Combating plant pests
DE903655C (en) Process for the direct production of positives
DE1175431B (en) Stabilization of acrylonitrile polymers
DE725304C (en) Neutral or Brown tone developer
DE1547906A1 (en) Photographic developer
DE923892C (en) Process for improving the whiteness of photographic images produced by the silver salt diffusion process
DE823791C (en) Process for removing cobalt from zinc electrolytes
DE899587C (en) Process for accelerating the development of photographic silver halide layers
DE1772638C3 (en) Process for controlling the development of multilayer color reversal films
DE708305C (en) Dry mix of chemicals
DE1494018B2 (en)
DE966040C (en) Hair care products
DE500437C (en) Process for the preparation of water-soluble secondary diazoamino compounds of the aromatic series
DE700913C (en) hischer halogen silver gelatine layers
DE676436C (en) Process for the preparation of aqueous solutions of p-aminobenzene sulfonamide
DE1177929B (en) Use of a new anti-bronzing agent for photographic printing materials