DE74842C - Process for developing photographic images using diamidocresol - Google Patents

Process for developing photographic images using diamidocresol

Info

Publication number
DE74842C
DE74842C DENDAT74842D DE74842DA DE74842C DE 74842 C DE74842 C DE 74842C DE NDAT74842 D DENDAT74842 D DE NDAT74842D DE 74842D A DE74842D A DE 74842DA DE 74842 C DE74842 C DE 74842C
Authority
DE
Germany
Prior art keywords
diamidocresol
photographic images
developing photographic
sulphurous
diamido
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
DENDAT74842D
Other languages
German (de)
Original Assignee
J. HAUFF in Feuerbach bei Stuttgart
Publication of DE74842C publication Critical patent/DE74842C/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
    • G03C5/30—Developers
    • G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Bei Vervollständigung der Reihe der Diamidoverbindungen des Phenols und der Kresole behufs Prüfung ihrer Brauchbarkeit zum Hervorrufen photographischer Bilder auf Halogensilbergelatineplatten und Halogensilberpapier hat es sich herausgestellt, dafs aufser o-p-Diamidophenol noch o-p-Diamido-o-kresolWith the completion of the series of diamido compounds of phenol and cresols for testing their usefulness in producing photographic images on silver halide gelatin plates and silver halide paper it has been found that besides o-p-diamidophenol nor o-p-diamido-o-cresol

(OH: NH2: NH2: CH3 =1:2:4 : 6)
und o-p-Diamido-m-kresol (OH: NH 2 : NH 2 : CH 3 = 1: 2: 4: 6)
and op-Diamido-m-cresol

(OH: NH2 : NH2: CH3 = 1:2:4:5)
in ganz derselben Weise als Entwickler Verwendung finden können wie das Diamidophenol. Auch bei diesen zwei neuen Entwickelungssubstanzen gilt, dafs sie in Verbindung mit schwefligsauren Alkalien oder schwefligsaurem Ammonium, ohne Gegenwart von freien Alkalien oder kohlensauren Alkalien, energisch das latente Bild hervorrufen und, wie bei Diamidophenol, an »Entwickelungskraft« sämmtlichen anderen Entwicklern überlegen sind. (OH: NH 2 : NH 2 : CH 3 = 1: 2: 4: 5)
can be used as a developer in exactly the same way as diamidophenol. With these two new developing substances it is also true that in combination with sulphurous alkalis or sulphurous ammonium, without the presence of free alkalis or carbonated alkalis, they vigorously evoke the latent image and, as with diamidophenol, are superior in "developing power" to all other developers.

Als Vorschrift kann gelten: 100 ecm Wasser, 0,5 g Diamidokresol, 5 g - schwefligsaures Alkali krystallisirt, wobei zu bemerken ist, dafs durch erhöhten Zusatz von schwefligsaurem Salz die reducirende Kraft verstärkt, durch Zusatz von Säuren (am besten schweflige Säure) oder von Brom- oder Chloralkalien dieselbe reducirt werden kann, woraus die Art und Weise der Anwendung der Entwickler für unter- oder überexponirte Platten von selbst erhellt. Es sei noch bemerkt, dafs an Stelle von neutralen schwefligsauren Salzen auch saure schwefligsaure Salze verwendet werden können, wenn gleichzeitig durch Anwendung von kohlensauren oder doppeltkohlensauren Salzen sämmtliche nicht gebundene Säure oder ein Theil derselben neutralisirt wird, wodurch die Vorschrift einer Verallgemeinerung fähig ist.The following can apply as a rule: 100 ecm of water, 0.5 g diamidocresol, 5 g - sulphurous alkali crystallizes, whereby it should be noted that this the reducing power is strengthened by the increased addition of sulphurous acid salt Addition of acids (preferably sulphurous acid) or of bromine or chlorine alkalis the same can be reduced, from which the manner of application of the developer for under- or over-exposed plates is self-evident brightens. It should also be noted that acidic salts can also be used instead of neutral sulphurous acid salts Sulphurous salts can be used when simultaneously by applying carbonate or bicarbonate of all salts unbound acid or a part of it is neutralized, whereby the prescription is capable of generalization.

Patenτ-Anspruch:Patenτ claim:

Anwendung von (o-p)-Diamido-o-kresol und (o-p)-Diamido-m-kresol an Stelle der im Haupt-Patent geschützten Anwendung von Amido-pamidophenol zum Hervorrufen photographischer Bilder auf Halogensilber haltenden Schichten nach Patent Nr. 60174 unter Ausschlufs kaustischer oder kohlensaurer Alkalien.Use of (o-p) -Diamido-o-cresol and (o-p) -Diamido-m-cresol instead of those in the main patent Protected application of amido-pamidophenol for producing photographic images on layers holding halosilver according to patent no. 60174 with the exclusion of caustic or carbonic acid alkalis.

BERLIN. GEDRUCKT IN DER REICHSDRUCKERELBERLIN. PRINTED IN THE REICHSDRUCKEREL

Claims (1)

KAISERLICHESIMPERIAL PATENTAMT.PATENT OFFICE. PATENTSCHRIFTPATENT LETTERING KLASSE S7: Photographs.CLASS S7: Photographs. Patentirt iöi Deutschen Reiche vom 27. Juli 1892 ab. Längste Dauer: 27. Februar 1907.Patented from the German Empire on July 27, 1892. Longest duration: February 27, 1907.
DENDAT74842D Process for developing photographic images using diamidocresol Expired - Lifetime DE74842C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE74842T

Publications (1)

Publication Number Publication Date
DE74842C true DE74842C (en)

Family

ID=5636909

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT74842D Expired - Lifetime DE74842C (en) Process for developing photographic images using diamidocresol

Country Status (1)

Country Link
DE (1) DE74842C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241964A (en) * 1962-04-10 1966-03-22 Polaroid Corp Diffusion transfer process using an oxidized 4, 6-diamino-ortho-cresol solution
US3326683A (en) * 1962-09-27 1967-06-20 Polaroid Corp Diffusion transfer photographic process using 4, 6-diamino-ortho cresol

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241964A (en) * 1962-04-10 1966-03-22 Polaroid Corp Diffusion transfer process using an oxidized 4, 6-diamino-ortho-cresol solution
US3326683A (en) * 1962-09-27 1967-06-20 Polaroid Corp Diffusion transfer photographic process using 4, 6-diamino-ortho cresol

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