DE923637C - Process for the protective coating of photographic image layers - Google Patents

Process for the protective coating of photographic image layers

Info

Publication number
DE923637C
DE923637C DEO1119D DEO0001119D DE923637C DE 923637 C DE923637 C DE 923637C DE O1119 D DEO1119 D DE O1119D DE O0001119 D DEO0001119 D DE O0001119D DE 923637 C DE923637 C DE 923637C
Authority
DE
Germany
Prior art keywords
image layers
protective coating
photographic image
water
layer
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
DEO1119D
Other languages
German (de)
Inventor
Walter Fermazin
Walter Ott
Walter Dr Wagner-Maass
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 DEO1119D priority Critical patent/DE923637C/en
Application granted granted Critical
Publication of DE923637C publication Critical patent/DE923637C/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
    • G03C11/08—Varnishing, e.g. application of protective layers on finished photographic prints

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)

Description

Verfahren zur Schutzbeschichtung photographischer Bildschichten Nach dein Patent 896:295 kann i man :die Schutzhe-:schichtung noch nasser photographischer Bildschichten dadurch vornehmen, daß man eiinen teil-@ve;i,se alkalisch-hydrolysierten Zelluloseesber, der nur in einem Gemisch von Azeton-Wasser löslich ist, in einer Lösung auf die nasse photographische Bildschicht aufbringt, die nicht alles zur klaren Löslichkeit ödes verseiften Esters notwendige Wasser enthält. Hierbei ist jedoch als ein gewisser Nachteil zu betrachten, d@aß die photographischen Bildschichten, :die mit einem Lack gleichbleibenden Wassergehalts behandelt werden sollen, auch einen dementsprechend einheitlichen Wassergehalt aufweisen, müssen, damit die Lacke durch zuviel oder zuwenig Wasser nicht zu einem trüben Film auftrocknen.Process for the protective coating of photographic image layers According to Your patent 896: 295 can be: the protective layer: even wet photographic Make image layers by hydrolyzing a partially alkaline hydrolyzed one Cellulose liver, which is only soluble in a mixture of acetone and water, in one Applying solution to the wet photographic image layer, which does not contain anything for clear solubility desolate saponified ester contains necessary water. Here is to be regarded as a certain disadvantage, however, that the photographic image layers, : which should be treated with a varnish of constant water content, too The paints must have a correspondingly uniform water content Do not dry up to a cloudy film with too much or too little water.

Es zeigt sich neun, daß dieser Nachteil erfindungsgemäß vermieden. werden kann und da13 Filme, deren Bildschicht verschiedene Feuch tigkeftsgrade aufweist, völlig transparent lackiert werden können, wenn man dem Lack eine gewisse Menge teilweise alkalisch hydrolysierten Polyvinyl@aze,üats hinzusetzt. Dabei kann das Polyvinyl,azieta@t ziemlich wefgehiend, gegebenenfalls sogar bis zu välliiger Wasserlöslichkeit, abgebaut sein. Man. kann erfindungsgemäß so vorgehen, daß man eine Lösung, die gleichzeitig 7ellulosmster und Polyvinyllazetat enthält, einer alkalischen Vexseifung unterwirft, oder man kann auch der auf @besitimmtengewünschten: Gnad versuiften, Zellulose-Ester-Lösung das für sich allein hydrolysierte Polyvinyllazetat ibzw., falls man vollständig verseift hat, dien. Polyvinylalkohol hinzugeben. Besonders bewährten sich Zusätze von 2 his 2o °/o, bezogen auf den Zelluloseestengehalt des Lackes. Dieser wird dadurch unempfindlicher gegen, den, schwankenden Wassergehalt der Bildschicht.It turns out that this disadvantage is avoided according to the invention. and that films whose image layer has different degrees of moisture Can be painted completely transparent if you add a certain amount of paint partially alkaline hydrolyzed polyvinyl aze, üats added. It can Polyvinyl, azieta @ t quite widespread, possibly even up to completely Water solubility, be dismantled. Man. can proceed according to the invention in such a way that a solution that simultaneously 7 contains cellulose ester and polyvinyl acetate, subjected to an alkaline soap, or you can also choose the one you want on @: Gnad saponify, cellulose ester solution the alone hydrolyzed polyvinyl acetate ibzw., if one completely has saponified, serve. Add polyvinyl alcohol. Additives have proven particularly useful from 2 to 2o%, based on the residual cellulose content of the paint. This becomes through it less sensitive to the fluctuating water content of the image layer.

Claims (1)

PATENTANSPRUCH: Verfahren zur Schutzbeschichtung photographischer Bildschichten gemäß Patent 896:295, dadurch gekennzeichnet, daß dem Lack"der als schichthildende Substanz teilweise hydrolysierten. ZeIllulaseestea enthält, teilweise oder gänzlich hydrolysiertes Polyvinylazetat zu be:Iielb,igem Zeitpunkt vor seiner Verwendung zugefügt wird.PATENT CLAIM: Process for protective coating of photographic materials Image layers according to Patent 896: 295, characterized in that the lacquer "as Layer-forming substance partially hydrolyzed. ZeIllulaseestea contains, in part or fully hydrolyzed polyvinyl acetate to be: much earlier than his Use is added.
DEO1119D 1942-12-11 1942-12-11 Process for the protective coating of photographic image layers Expired DE923637C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO1119D DE923637C (en) 1942-12-11 1942-12-11 Process for the protective coating of photographic image layers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO1119D DE923637C (en) 1942-12-11 1942-12-11 Process for the protective coating of photographic image layers

Publications (1)

Publication Number Publication Date
DE923637C true DE923637C (en) 1955-02-17

Family

ID=7349447

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO1119D Expired DE923637C (en) 1942-12-11 1942-12-11 Process for the protective coating of photographic image layers

Country Status (1)

Country Link
DE (1) DE923637C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245729B (en) * 1959-05-19 1967-07-27 Gevaert Photo Prod Nv Process for the optical brightening of coated paper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245729B (en) * 1959-05-19 1967-07-27 Gevaert Photo Prod Nv Process for the optical brightening of coated paper
DE1245729C2 (en) * 1959-05-19 1974-06-20 Gevaert Photo Prod Nv Process for the optical brightening of coated paper

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