DE393674C - Production of inscriptions on photographic paper - Google Patents

Production of inscriptions on photographic paper

Info

Publication number
DE393674C
DE393674C DEP46647D DEP0046647D DE393674C DE 393674 C DE393674 C DE 393674C DE P46647 D DEP46647 D DE P46647D DE P0046647 D DEP0046647 D DE P0046647D DE 393674 C DE393674 C DE 393674C
Authority
DE
Germany
Prior art keywords
paper
clay
inscriptions
photographic paper
bath
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
DEP46647D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEP46647D priority Critical patent/DE393674C/en
Application granted granted Critical
Publication of DE393674C publication Critical patent/DE393674C/en
Expired 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
    • G03C11/00—Auxiliary processes in photography

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Printing (AREA)

Description

Herstellung von Inschriften auf photographischen Papieren. Gegenstand der vorliegenden Erfindung bildet ein Verfahren zur Herstellung von Inschriften u. dgl. auf photographischen Papieren, wobei die Schriftzüge in weiß erscheinen. Die Erfindung soll hauptsächlich zur Übermittlung von Geheimschriften Anwendung finden, und das Verfahren besteht darin, daß die Schriftzüge auf dem Papier mittels für Auskopierpapiere gebräuchlichem Tonbad oder Tonfixierbad ausgeführt werden, wobei sie von dem Bad getroffenen Stellen gegen die Einwirkung des Lichtes unempfindlich werden, so daß nach der in üblicher Weise erfolgten Behandlung des Papiers im Tonbad oder Tonfixierbad die Schriftzüge in hellen Linien auf dem Papier erscheinen.Production of inscriptions on photographic paper. object The present invention provides a method of making inscriptions and the like on photographic paper, the lettering appearing in white. The invention is primarily intended to be used for the transmission of ciphertexts find, and the process consists of putting the lettering on the paper by means of clay bath or clay fixing bath commonly used for copy paper, where the areas hit by the bath are insensitive to the action of light so that after the usual treatment of the paper in the clay bath or clay fixer, the lettering appears in light lines on the paper.

Ausführungsbeispiel z: Celloidinpapier oder ein ähnliches Papier für Tageslichtbestrahlung wird mit wasserklarem Tonbad mittels einer nicht kratzenden Feder beschrieben. Die Schriftzüge sind nach dem Trocknen gegen die Lichteinwirkung unempfindlich und nach dem Behandeln des Papiers im Tonbad erschBinen dieselben in weiL?en Linien auf dem im übrigen getonten Feld. Ausführungsbeispiel 2: Gaslichtpapier wird bekanntlich mittels Entwickler und Tonfixierbad behandelt. Die Aufhebung der Entwicklung erfolgt hier durch das Tonfixierbad. Nach dem Behandeln des Papiers erscheinen auch in diesem Fall die Schriftzüge in weißen Linien.Embodiment z: celloidin paper or a similar paper for Daylight irradiation is carried out with a water-clear clay bath using a non-scratching one Spring described. After drying, the lettering is against the effects of light They appear insensitive and after treating the paper in the clay bath in white lines on the rest of the toned field. Embodiment 2: gas light paper is known to be treated with a developer and clay fixer. The lifting of the Development takes place here through the clay fixer. After treating the paper In this case, too, the lettering appears in white lines.

Insbesondere eignet sich das neue Verfahren jedoch zur Übermittlung von Geheimschriften. Das Papier, beispielsweise Postkarte, kann in der beschriebenen Weise vorbehandelt sein. Dem Empfänger ist allein bekannt, daß er durch übliches Behandeln des Papiers im Bad die Schriftzüge erscheirien lasen kann, während zur Täuschung unbeteiligter Personen dieselbe mit Schriften in Tinte o. dgl. versehen ist.In particular, however, the new method is suitable for transmission of secret scripts. The paper, for example postcard, can be described in the Be pretreated wisely. The recipient alone is aware that he has received the usual Treating the paper in the bathroom can read the lettering while working Deception of bystanders provided the same with writings in ink or the like is.

Claims (1)

PATENTANSPRUCH: Verfahren zur Anbringung von Schriftzügen u. dgl. auf photographischen Papieren, insbesondere zur Übermittlung von Geheimschriften, dadurch gekennzeichnet, daß das Papier vor dem Belichten mit Tonbad oder Tonfixierbad beschrieben wird, so daß die Schriftzüge nach der Behandlung des Papiers im Bade in weißen Linien erscheinen. PATENT CLAIM: A method for applying lettering and the like to photographic paper, in particular for the transmission of secret writing, characterized in that the paper is written on with a clay bath or clay fixer before exposure, so that the text is white after the paper has been treated in the bath Lines appear.
DEP46647D 1923-08-05 1923-08-05 Production of inscriptions on photographic paper Expired DE393674C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP46647D DE393674C (en) 1923-08-05 1923-08-05 Production of inscriptions on photographic paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP46647D DE393674C (en) 1923-08-05 1923-08-05 Production of inscriptions on photographic paper

Publications (1)

Publication Number Publication Date
DE393674C true DE393674C (en) 1924-04-05

Family

ID=7381868

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP46647D Expired DE393674C (en) 1923-08-05 1923-08-05 Production of inscriptions on photographic paper

Country Status (1)

Country Link
DE (1) DE393674C (en)

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