US2239704A - Light-sensitive layer and method of making the same - Google Patents

Light-sensitive layer and method of making the same Download PDF

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Publication number
US2239704A
US2239704A US255344A US25534439A US2239704A US 2239704 A US2239704 A US 2239704A US 255344 A US255344 A US 255344A US 25534439 A US25534439 A US 25534439A US 2239704 A US2239704 A US 2239704A
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US
United States
Prior art keywords
light
carrier
binder
sensitive
layer
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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
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US255344A
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English (en)
Inventor
Boer Jan Hendrik De
Alink Roelof Jan Hendrik
Jonkers Johannes Jose Antonius
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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Publication date
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Publication of US2239704A publication Critical patent/US2239704A/en
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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
    • G03C1/00—Photosensitive materials
    • G03C1/52—Compositions containing diazo compounds as photosensitive substances

Definitions

  • a light-sensitive layer capable of self-development one which contains a diazonium compound, a coloring component, and if desired an alkaline-reacting substance, and with which images can be produced, after an exposure, solely by applying water to the layer.
  • a light-sensitive layer capable of self-development is meant one which contains a diazonium compound, a coloring component, and if desired an alkaline-reacting substance, and with which images can be produced, after an exposure, solely by applying water to the layer.
  • coloring component is to be understood to mean a material which, in the presence of water, and if desired an alkaline-reacting substance, is capable of reacting with the diazonium compound to produce dyestufi.
  • One object of our invention is to provide an improved method of making such layers.
  • a further object is to produce light-sensitive self-developing layers which are less subject to premature development due to atmospheric conditions and handling, and are protected against abrasion.
  • a still further object is to increase the sharpness and detail of the prints produced on such layers.
  • Another object is to permit the development to be effected in a satisfactory way by applying liquid water to the layer.
  • a suitable carrier for instance a strip of paper
  • a solution containing a diazonium compound we then place at least one of the materials required for the formation of dyestufi in suspension by mixing the same in a finely-divided state in a solution comprising a binder dissolved in a volatile liquid solvent which will not dissolve any substance required for the formation of the dyestuff.
  • This suspension is applied to the sensitized dry carrier, and then the solvent is volatilized to form a layer containing the binder and suspended material.
  • a coloring component an alkaline-reacting component, or both by means of a suspension thereof.
  • the light used for making the exposure acts in a very homogeneous manner with there- In the Netherlands February sult that the finished prints have very sharp de- ..tail.
  • binders which, for the light to which the diazonium compound is sensitive, have indices of refraction which are as close as possible to that of the suspended material.
  • indices of refraction which are as close as possible to that of the suspended material.
  • the layer applied by the method of the present invention is extremely well protected mechanically, for example against any rubbing or scrubbing which may occur during handling or winding into rolls, and is also protected chemically, for instance against the action of moisture of the atmosphere and handling the light-sensitive material with moist fingers.
  • volatile liquid solvents and of binder materials depends upon s veral factors.
  • the solvent must, of course, be volatile and must be one in which only the binder will dissolve, but in which all other substances to be used should not dissolve.
  • the binder material should be one which, when in its solid state, is rather flexible, should be substantially transparent to the light to which the layer is sensitive, and should not discolor the carrier.
  • binders for carrying out the invention we may mention for example, substances such as polystyrene, the polymerisate of esters of acrylic acid, which is sold under the name Plexigum; resins, such as dammar resins and mastix; and various kinds of waxes, such as beeswax, all of these binders being soluble in a solvent suitable for each individual case.
  • the above binder substances are particularly suitable for carrying out the invention because their indices of refraction are close to those of the suspended materials, and also because the binder layers obtained with these substances are sufllciently elastic to allow the light-sensitive material to be handled without damage.
  • a substance such as paraflin is unsuitable in this respect because a binder layer obtained therewith is rather brittle and must be handled with great care to avoid cracking, which makes it inconvienient for every day use.
  • the binder substances should be transparent to the light to which the layer is sensitive and should not discolor the carrier.
  • chlorated hydrocarbons chloro-organic compounds
  • C014 carbon tetrachloride
  • CH2CLCH2C1 ethylene chloride
  • binders the above-mentioned polystyrene or Plexigum.
  • a mixture of binders may be very useful.
  • the suspended material be distributed as homogeneously as possible throughout the dispersion agent during the application of the suspension to the sensitized layer.
  • the binder solution a sufliciently high viscosity.
  • the thickness of the binder layer should be such that it is sufficiently permeable to water.
  • photochemicallyinert additional substances may be applied to the carrier.
  • suitable materials for these purposes we might mention dried starch and a substance which with an alkali yields a hydrated oxide soluble with difficulty, for instance aluminium sulphate. The use of such substances has been described in the U. S. Patent 2,113,193 to Jan Hendrik de Boer and in the British Patent 454,814.
  • the suspensions of the invention may be easily applied to a carrier, for example a paper carrier, by means of a roller.
  • a substance producing an alkaline reaction such as anhydrous sodium carbonate, sodium bicarbonate, quicklime and the like, a dyestufi component, such as phloroglucinol, R-salt (sodium salt of 2-hydroxynaphthaline-3.6- disulphonic acid) and the like, and an additional substance such as aluminium sulphate, dried flour of wheat and the like may be suspended in the following manner.
  • a finely-divided mixture of the above materials is mixed in a ballmill with a binder, which has been ground heforehand in a ball-mill whilst using alcohol and subsequently collected on a filter and dried.
  • the resulting mixture is dispersed in a carbon tetrachloride solvent by shaking, in a proportion of, for example, 100 grams of the mixture to 1 litre of solvent.
  • phloroglucinol [CaH3(OH)a.2H2O]
  • NazCOz anhydrous-sodiumcarbonate
  • borax Na2B40'L10H20
  • the anhydrous sodium carbonate and borax are ground separately or together in a ball mill in the presence of ethylalcohol, after which the alcohol is removed by filtering and drying.
  • the phloroglucinol is ground in the same manner with trichloroethylene. Then follows the suspending operation of the above mixture of substances in the binder solution, which operation too is carried out in a ball mill.
  • the suspension so obtained is applied in a thin layer on to the paper by means of a pair of rollers, whereupon the solvent is evaporated under the application of moderate heating.
  • the paper is then ready for use.
  • the print After exposing under a drawing the print is developed by applying a thin film of water e. g. by treating the surface of the paper with a moist stop of cotton-wool.
  • the print has excellent black lines on a white ground.
  • Additional substances as aluminiumsulfate and the like can be used with advantage when the presence of a larger quantity of alkaline substances is desired.
  • a light-sensitive layer capable of being developed solely by the application of water
  • the steps of sensitizing a carrier with a diazonium compound capable of reactingwith a coloring component in the presence of suf-- ficient water and if desired an alkaline-reacting component to form coloring matter suspending at least one of said components in a finely-divided state in a solution of a binder dissolved in a volatile solvent incapable of dissolving any of the materials required for the formation of coloring matter, coating the dried sensitized carrier with the suspension, and volatilizing the solvent.
  • a light-sensitive layer containing a diazonium compound and a coloring component capable of reactin in the presence of an alkaline-reacting substance and water to produce coloring matter the steps of sensitizing a carrier with the diazonium compound, suspending the coloring component in a finely-divided state in a solution of a binder dissolved in a vola tile solvent incapable of dissolving any of the materials required for the formation of coloring matter, coating the dried sensitized carrier with the suspension, and volatilizing the solvent.
  • a. light-sensitive material from a diazonium compound and a coloring component capable of reacting in the presence of an alkaline-reacting substance and water to produce coloring matter
  • the steps of sensitizing a carrier by applying a solution of the diazonium compound thereto, suspending in a finely-divided state in a solution of a binder dissolved in a volatile solvent incapable of dissolving any of .the materials required for the formation of coloring matter the coloring component and a substance with which an alkali yields a difiicultly-soluble hydrated oxide, coating the dried sensitized carrier with the suspension, and volatilizing the solvent.
  • a light-sensitive material comprising a carrier, a light-sensitive layer supported by said carrier and including a diazonium compound, a coloring component capable of reacting with said ,diazonium compound in the presence of an alkater to produce dyestuii, and a, layer of a binder adhering to the carrier and being transparentto the light to which the diazonium compound is sensitive and containing homogeneously-distributed the coloring component in a finely-divided state, said binder having an index of refraction substantially equal to that of the coloring component for the light to which the diazonium compound is sensitive.
  • a light-sensitive material made by the method of claim 1.
  • a light-sensitive material comprising a paper carrier, a light-sensitive layer supported by said carrier and including a diazonium compound and a coloring component capable of reacting in the presence of an alkaline-reacting component and suflicient water to produce dyestuif, and a layer of a binder adhering to said carrier and being transparent to the light to which the diazonium compound is sensitive, said coloring component being in a finely-divided state and homogeneously distributed throughout said latter layer, said coloring component being readily removable from the carrier by agitating the mamaterial made by the material made by the material made by the terial in a solvent in which the binder is soluble and the coloring component isinsoluble.

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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)
US255344A 1938-02-10 1939-02-08 Light-sensitive layer and method of making the same Expired - Lifetime US2239704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL86388 1938-02-10

Publications (1)

Publication Number Publication Date
US2239704A true US2239704A (en) 1941-04-29

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ID=19750285

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US255344A Expired - Lifetime US2239704A (en) 1938-02-10 1939-02-08 Light-sensitive layer and method of making the same

Country Status (7)

Country Link
US (1) US2239704A (cs)
BE (1) BE432677A (cs)
CH (1) CH212652A (cs)
DE (1) DE714560C (cs)
FR (1) FR850072A (cs)
GB (1) GB524786A (cs)
NL (1) NL50897C (cs)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481770A (en) * 1946-03-15 1949-09-13 Eastman Kodak Co Antihalation photographic film
US2501874A (en) * 1946-06-12 1950-03-28 Gen Aniline & Film Corp Photographic diazo-sensitized glassine paper
US2657141A (en) * 1947-07-14 1953-10-27 Grinten Chem L V D Diazotype developer composition containing a potassium borate and process of using same
US2699392A (en) * 1951-12-12 1955-01-11 Gen Aniline & Film Corp Vesicular prints and process of making same
US2703756A (en) * 1951-12-12 1955-03-08 Gen Aniline & Film Corp Vesicular prints and process of making same
US2732299A (en) * 1952-07-22 1956-01-24 Light sensitive
US2772974A (en) * 1954-02-10 1956-12-04 Gen Aniline & Film Corp Light sensitive diazotype materials
US3642483A (en) * 1966-11-07 1972-02-15 Ricoh Kk Thermally developable diazotype copying materials
US3976488A (en) * 1969-02-19 1976-08-24 Mita Industrial Company, Ltd. Treating agent for diazo-type multicolor reproduction

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616803A (en) * 1948-03-11 1952-11-04 Leonard E Ravich Diazotype dyeing and printing of web or sheet material
US2743191A (en) * 1952-05-13 1956-04-24 Dick Co Ab Method for manufacturing transfer sheets for spirit duplication

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481770A (en) * 1946-03-15 1949-09-13 Eastman Kodak Co Antihalation photographic film
US2501874A (en) * 1946-06-12 1950-03-28 Gen Aniline & Film Corp Photographic diazo-sensitized glassine paper
US2657141A (en) * 1947-07-14 1953-10-27 Grinten Chem L V D Diazotype developer composition containing a potassium borate and process of using same
US2699392A (en) * 1951-12-12 1955-01-11 Gen Aniline & Film Corp Vesicular prints and process of making same
US2703756A (en) * 1951-12-12 1955-03-08 Gen Aniline & Film Corp Vesicular prints and process of making same
US2732299A (en) * 1952-07-22 1956-01-24 Light sensitive
US2772974A (en) * 1954-02-10 1956-12-04 Gen Aniline & Film Corp Light sensitive diazotype materials
US3642483A (en) * 1966-11-07 1972-02-15 Ricoh Kk Thermally developable diazotype copying materials
US3976488A (en) * 1969-02-19 1976-08-24 Mita Industrial Company, Ltd. Treating agent for diazo-type multicolor reproduction

Also Published As

Publication number Publication date
BE432677A (cs)
GB524786A (en) 1940-08-14
NL50897C (cs)
CH212652A (de) 1940-12-15
FR850072A (fr) 1939-12-07
DE714560C (de) 1941-12-02

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