DE533676C - Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses - Google Patents

Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses

Info

Publication number
DE533676C
DE533676C DEI36633D DEI0036633D DE533676C DE 533676 C DE533676 C DE 533676C DE I36633 D DEI36633 D DE I36633D DE I0036633 D DEI0036633 D DE I0036633D DE 533676 C DE533676 C DE 533676C
Authority
DE
Germany
Prior art keywords
different
emulsion layers
joint development
silver emulsion
steepnesses
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
DEI36633D
Other languages
German (de)
Inventor
Dr Richard Schmidt
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 DEI36633D priority Critical patent/DE533676C/en
Priority claimed from GB20834/31A external-priority patent/GB379820A/en
Application granted granted Critical
Publication of DE533676C publication Critical patent/DE533676C/en
Expired legal-status Critical Current

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Description

Verfahren zur gemeinsamen Entwickelung mehrerer auf verschiedenen Trägern befindlicher Halogensilberemulsionsschichten auf verschiedene Steilheit Es ist in manchen Fällen wünschenswert, mehrere belichtete Halogensilberemulsionsschichten gemeinsam und gleich lange, aber auf verschiedene Steilheit zu entwickeln. Dies war bisher nicht möglich, sondern man mußte in diesem Falle einen unbefriedigenden Mittelweg einschlagen, indem man für die gemeinsame Entwicklung einen Entwickler wählte, welcher weder ganz steil noch ganz flach arbeitete. Hierbei ergab sich zwangsläufig, daß keine der entwickelten Schichten das zu erstrebende Bestmaß der Dichte-Stufenfolge erhielt.Method for the joint development of several on different Supports located halogen silver emulsion layers on different steepness In some cases it is desirable to have multiple exposed halosilver emulsion layers develop together and for the same length of time, but on different slopes. this was not possible up to now, but in this case one had to choose an unsatisfactory one Strike the middle ground by hiring a developer to develop together chose the one that worked neither very steeply nor completely flat. This inevitably resulted that none of the developed layers achieve the best measure of density gradation to be striven for received.

Es wurde nun gefunden, daß man auch bei gemeinsamer Entwicklung in regelbarer Weise verschiedene Gradationen erreicht, wenn man in an sich bekannter Weise die steiler zu entwickelnde Schicht durch Behandlung mit einem geeigneten Vorbade willkürlich in ihrer Gradation abstuft und sie dann gemeinsam mit den anderen Schichten in einer auf diese abgestimmten, also flach arbeitenden Entwicklerlösung entwickelt.It has now been found that even with joint development in different gradations can be achieved in a controllable manner, if one is in a known manner Make the steeper layer to be developed by treating it with a suitable one Vorbade arbitrarily graduates in their gradation and then together with the others Layers in a developer solution that is tailored to this, i.e. it works flat developed.

Als Vorbad können alle Lösungen angewendet werden, welche im Zusammenwirken mit der jeweils zu verwendenden Entwicklerlösung ein Steilerwerden der Gradation bewirken. Es eignen sich hierzu insbesondere die üblichen Alkalien, z. B. Alkalicarbonate; aber auch andere Stoffe, z. B. Härtungsmittel, beeinflussen die Gradation. Konzentration und Dauer des Vorbades bedingen in regelbarer Weise die zu erreichende Steilheit der Schicht.All solutions that work together can be used as a pre-bath the gradation becomes steeper with the developer solution to be used cause. The usual alkalis such. B. alkali carbonates; but also other substances, e.g. B. hardeners, affect the gradation. concentration and the duration of the pre-bath determine the steepness to be achieved in an adjustable manner the shift.

Beispiel r Ein belichteter Negativbildfilm wird in einer o,5 bis 2 proz. Lösung von Na2C03 oder K,C03 Z bis 3 Minuten gebadet und dann, gegebenenfalls nach kurzem Abspülen in Wasser, zusammen mit dem gemeinsam aufgenommenen Negativtonfilm in einer Entwicklerlösung entwickelt, welche so eingestellt ist, daß sie das auf einer Emulsion mit möglichst durchhangfreier Gradationskurve aufgenommene Tonfilmnegativ ohne Vorbad so gut wie möglich, d. h. verhältnismäßig schwach, entwickelt. Hierzu eignet sich u. a. ein sulfithaltiger lIethyl-p-aminophenolentwickler. Die Schwärzungen des alkalisch vorbehandelten Bildfilmnegativs erscheinen sofort beim Einbringen in die Entwicklerlösung, und man erhält ein vorzügliches Bildnegativ in der erwünschten Steilheit, während gleichzeitig das Tonnegativ in der erforderlichen flacheren Gradation entsteht.Example r An exposed negative image film is in a 0.5 to 2 percent Solution of Na2C03 or K, C03 Z bathed for up to 3 minutes and then, if necessary after a short rinse in water, together with the negative sound film recorded together developed in a developer solution which is adjusted to the sound film negative recorded in an emulsion with a gradation curve that is as slack as possible as good as possible without a pre-bath, d. H. relatively weak, developed. For this is suitable, inter alia. a sulfite-containing ethyl-p-aminophenol developer. The blackenings of the alkaline pretreated film negative appear immediately upon insertion into the developer solution, and an excellent negative image is obtained in the desired one Steepness, while at the same time the tone negative in the required flatter gradation arises.

Durch Zusatz von geringen Mengen Kahumbromid zum Vorbad wird dessen Ausnutzbarkeit erhöht. Beispiel 2 Eine belichtete Emulsiönsschicht wird 2 Minuten lang - in einer- 2 proz. Formalinlösung vorbehandelt und dann mit sulfithaltigem Methyl-p-aminophenolentwickler entwickelt. Man erhält gegenüber der Entwicklung ohne Vorbad eine wesentlich steilere Gradation. Da dieses Vorbad gleichzeitig eine gewisse Verringerung der Empfindlichkeit bedingt, eignet es sich insbesondere zur Entwicklung von reichlich belichteten Aufnahmen.By adding small amounts of potassium bromide to the prebath it becomes Exploitability increased. Example 2 An exposed emulsion layer will last for 2 minutes - in one- 2 percent. Formalin solution pretreated and then with sulfite-containing methyl-p-aminophenol developer. Compared to the Development without pre-bath a much steeper gradation. Because this prebath at the same time it is particularly suitable because of a certain reduction in sensitivity for developing copiously exposed images.

Claims (1)

PATENTANSPRUCH: Verfahren zur gemeinsamen Entwickelung mehrerer auf verschiedenen Trägern befindlicher Halogensilberemulsionsschichten auf verschiedene Steilheit, dadurch gekennzeichnet, daB man die steiler zu entwickelnde Schicht durch Behandlung mit einem geeigneten Vorbade in ihrer Gradation willkürlich abstuft und dann gemeinsam mit den übrigen Schichten in einer auf diese abgestimmten Entwicklerlösung gleich lange entwickelt.PATENT CLAIM: Process for the joint development of several halogen silver emulsion layers on different supports on different Steepness, characterized in that one passes through the steeper layer to be developed Treatment with a suitable pre-bath in their gradation and gradation then together with the other layers in a developer solution tailored to them developed for the same time.
DEI36633D 1928-12-31 1929-01-01 Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses Expired DE533676C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI36633D DE533676C (en) 1928-12-31 1929-01-01 Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEI0036633 1928-12-31
DEI36633D DE533676C (en) 1928-12-31 1929-01-01 Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses
GB20834/31A GB379820A (en) 1928-12-31 1931-07-21 Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supports

Publications (1)

Publication Number Publication Date
DE533676C true DE533676C (en) 1934-06-04

Family

ID=27210993

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI36633D Expired DE533676C (en) 1928-12-31 1929-01-01 Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses

Country Status (1)

Country Link
DE (1) DE533676C (en)

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