US2066918A - Light-sensitive material and a proc - Google Patents

Light-sensitive material and a proc Download PDF

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Publication number
US2066918A
US2066918A US2066918DA US2066918A US 2066918 A US2066918 A US 2066918A US 2066918D A US2066918D A US 2066918DA US 2066918 A US2066918 A US 2066918A
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Prior art keywords
light
silver
diazo
picture
sensitive
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    • 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
    • G03C1/00Photosensitive materials
    • G03C1/52Compositions containing diazo compounds as photosensitive substances
    • G03C1/62Metal compounds reducible to metal

Definitions

  • the present invention relates to light-sensitive material, capable of yielding positive pictures from a negative original and to a process of producing pictures therefrom.
  • One object of the present invention is lightsensitive materials which are prepared by applying silver salts in mixture with light-sensitive diazo compounds upon or in a suitable support.
  • the light-sensitive materials thus obtained yield rather good silverpictures, after exposure to light, after-treatment with alkalies or the like and fixation.
  • All silver salts which are watersoluble may be used for the present invention, as for instance, silver nitrate.
  • diazo compounds there may be used all such stable, light-sensitive diazo compounds. as yield, when exposed to light, decomposition products capable of exercizing a reducing-action on the exposed silver salt.
  • Such di- 20 azo compounds are, for instance, amino diazo com pounds of the benzene or naphthalene series, which may be substituted in the nucleus or in the amino group, for instance, by alkyl, hydroxy groups, carboxy groups, sulfo groups, halogen or the like.
  • the amino diazo compounds of the benzene series useful in the present invention are preferably obtained from amino compounds of the following general formula: R-NH2 wherein R stands for a benzeneor a naphthaleneradical being substituted in the nucleus by hydroxy, halogen, alkyl, oxalkyl, oxaryl, oxaralkyl.
  • diazo compounds may be used as such, or in the form of salts, such as, for instance, sulfates, chlorobenzene-sulfonates, or the like.
  • Another object of the present invention is the process of preparing pictures from the light-sen-
  • the material is exposed to light under a design and thereby is obtained a positive picture from a negative design and vice versa.
  • the. picture is treated with alkali or substances having an alkaline action, such as, for instance, ammonia, soda, borax, sodium acetate or the like, alone or in mixture with one another, and then subjected to a washing or fixating process, for instance, with sodium thiosulfate, in order to remove the substances which have not reacted.
  • the formation of the picture probably takes place in such a way,.that the light acts upon the diazo compound which is rather sensitive to light, whereby the latter yields a. decomposition prodnot.
  • This product which preferably has a reducing action, acts upon the silver salt with the formation of metallic silver, which action is completed by the subsequent treatment with a substance of alkaline action.
  • the silver picture thus obtained is then fixed in the usual manner.
  • the light-sensitive material can be prepared according to one of the methods usually employed in diazo type printing and in photography. It is possible, for instance, simply to apply an aqueous or an aqueous-alcoholic solution of the mixtures of diazo compounds and silver salts on a base, for instance, paper, gelatinized paper or a film from a cellulose derivative or cellulose hydrate; the preservatives known from the photoprinting industry, such as, for instance, metal salts, acids, dextrine, starch etc. may be added.
  • the lightsensitive substances can also be applied on a base in a colloid, such as, for instance, gelatine, in a manner customary in the photographic industry.
  • the proportion of the diazo salts and silver salts may vary within wide limits. According to the quantities of the two constituents, the kind of the diazo compounds, the silver salts and the substances added to the layer, and according to the after-treatment with alkaline agents, the tones vary from brown to black, and the gradation of the pictures varies, too.
  • Other light-sensitive substances such as, for instance, ferric ammonium citrate, may be mixed with the layers, whereby more dark brown picturesare obtained.
  • Ferric ammonium citrate has already been used together with silver salts for the preparation of light-sensitive layers, but when using the same quantities of silver, there cannot be obtained such rich and deep tones as according'to the present process.
  • Lightsensitive material sensitized by means of a mixture of a water-soluble silver salt and a light-sensitive aromatic amino diazo compound of the benzene .series, the silver salt being used in sufiicient quantity to produce a silver picture.
  • a process of preparing positive pictures from a negative design which comprises exposing to light under the design a light-sensitive material sensitized by means of a mixture of a water-soluble silver salt and a light-sensitive aromatic amino diazo compound of the benzene series, the
  • silver salt being used in sufficient quantity to produce a silver picture, subjecting the picture thus obtained to the action of a. substance of alkaline acticnand then toa fixing process.
  • a process of preparing positive pictures from a negative design which comprises exposing to light under the design a light-sensitive material sensitized by means of a mixture of silver nitrate and 1-diazo-4-diethylaminobenzene-2-carboxylic acid, subjecting the picture thus obtained to the action of a substance of alkaline action and then to a fixing process.
  • a process of preparing positive pictures from a negative design which comprises exposing to light under the design a light-sensitive material sensitized by means of a mixture of silver nitrate and 4-diazodiphenylamine, subjecting the picture thus obtained to the action of a substance of alkaline action and then to a fixing process.
  • a process of preparing positive pictures from a negative design which comprises exposing to light under the design a light-sensitive material sensitized by means of a mixture of silver nitrate and 1-diazo-4-aminobenzene, subjecting the picture thus obtained to the action of a substance of alkaline action and then to a fixing process.
  • Light-sensitive material sensitized by means of a water-soluble silver salt and a light-sensitive aromatic diazo compound, the light decomposition products of which have reducing properties for the exposed silver salt, the silver salt being used in sufiicient quantity to produce a silver picture.
  • Light-sensitive material sensitized by means of a. water-soluble silver salt and a light-sensitive aromatic diazo compound, which is substituted in the para-position to the diazo group by an amino group, the silver salt being used in sufiicient quantity to produce a silver picture.
  • a process of preparing positive pictures from a negative design which comprises exposing to )ight under the design a light-sensitive material sensitized by means of a mixture of a watersoluble silver salt and a light-sensitive aromatic diazo compound, the light decomposition products of which have reducing properties for the exposed silver salt, the silver salt being used in sufficient quantity to produce a silver picture, and subjecting the picture thus obtained to the action of a substance of alkaline action and then to a fixing process.
  • a process of preparing positive pictures from a negative design which comprises exposing to .light under the design a light-sensitive rnaterial sensitized. by means of a water-soluble silver salt and a light-sensitive aromatic diazo compound, which is substituted in the para-position to the diazo group by an amino group, the silver salt being used in sufficient quantity to produce a silver picture, and subjecting the picture thus obtained to the action of a substance of alkaline action and then to a' fixing process.
  • X stands fora diazo group
  • Y stands for a member of the group consisting of hydrogen and an alkyl-amino group
  • Z stands for a member of the group consisting of hydrogen, hydroxy, amino, alkyl-amino,andaryl-aminoof the benzene series, only one of the substituents Z and Y standing for hydrogen, the silver salt being used in sufficient quantity to produce a silver picture.
  • a process of preparing positive pictures from a negative design which comprises exposing to light under the design, a light-sensitive material sensitized by means of a water-soluble silver salt and a light-sensitive diazo compound of the benzene series conforming to the following structural formula:
  • X stands for a diazo group
  • Y stands for a, member of the group consisting of hydrogen and an alkyl-amino group
  • Z stands for a member of the group consisting of hydrogen, hy droxy, amino, alkyl-amino, and aryl-amino of the benzene series, only one of the substituents Z and Y standing for hydrogen, the silver salt being used in sufficient quantity to produce a silver picture and subjecting the picture, thus obtained, to the action of a substance of alkaline action and, then, to a fixing process.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US2066918D 1931-09-21 Light-sensitive material and a proc Expired - Lifetime US2066918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0122203 1931-09-21

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US2066918A true US2066918A (en) 1937-01-05

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US (1) US2066918A (en, 2012)
FR (1) FR744706A (en, 2012)
GB (1) GB391677A (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618555A (en) * 1949-04-09 1952-11-18 Kalle & Co Ag Process for positive diazotype and negative metal reduction images and light-sensitive material therefor
US2741558A (en) * 1952-03-11 1956-04-10 Grinten Chem L V D Process for the manufacture of diazotype copies
US2773768A (en) * 1951-03-20 1956-12-11 Grinten Chem L V D Light-sensitive diazotype material
US2780547A (en) * 1954-06-30 1957-02-05 Bruning Charles Co Inc Diazotype photoprinting materials and processes for preparing same
US2929709A (en) * 1951-07-10 1960-03-22 Philips Corp Photographic process
US2952538A (en) * 1950-07-25 1960-09-13 Philips Corp Photographic process
US3007795A (en) * 1955-02-11 1961-11-07 Agfa Ag Process for the production of laterally non-reversed positive copies by heat development
US3409438A (en) * 1963-08-26 1968-11-05 Minnesota Mining & Mfg Photosensitive heat developable copysheet
US4066456A (en) * 1974-12-10 1978-01-03 Gaf Corporation Incorporated carboxy substituted p-phenylenediamine color developer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618555A (en) * 1949-04-09 1952-11-18 Kalle & Co Ag Process for positive diazotype and negative metal reduction images and light-sensitive material therefor
US2952538A (en) * 1950-07-25 1960-09-13 Philips Corp Photographic process
US2773768A (en) * 1951-03-20 1956-12-11 Grinten Chem L V D Light-sensitive diazotype material
US2929709A (en) * 1951-07-10 1960-03-22 Philips Corp Photographic process
US2741558A (en) * 1952-03-11 1956-04-10 Grinten Chem L V D Process for the manufacture of diazotype copies
US2780547A (en) * 1954-06-30 1957-02-05 Bruning Charles Co Inc Diazotype photoprinting materials and processes for preparing same
US3007795A (en) * 1955-02-11 1961-11-07 Agfa Ag Process for the production of laterally non-reversed positive copies by heat development
US3409438A (en) * 1963-08-26 1968-11-05 Minnesota Mining & Mfg Photosensitive heat developable copysheet
US4066456A (en) * 1974-12-10 1978-01-03 Gaf Corporation Incorporated carboxy substituted p-phenylenediamine color developer

Also Published As

Publication number Publication date
GB391677A (en) 1933-05-04
FR744706A (en, 2012) 1933-04-26

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