US3476578A - Thermographic method for producing thermostable prints - Google Patents

Thermographic method for producing thermostable prints Download PDF

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US3476578A
US3476578A US559487A US3476578DA US3476578A US 3476578 A US3476578 A US 3476578A US 559487 A US559487 A US 559487A US 3476578D A US3476578D A US 3476578DA US 3476578 A US3476578 A US 3476578A
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heat
sensitive
layer
recording
radiation
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Eric Maria Brinckman
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Agfa Gevaert NV
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Agfa Gevaert NV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/38235—Contact thermal transfer or sublimation processes characterised by transferable colour-forming materials

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  • FIG; 2 THERMOGRAPHIC METHOD FOR PRODUCING THERNOSTABLE FRINIS Filed June 22. 1966
  • FIG; 2 THERMOGRAPHIC METHOD FOR PRODUCING THERNOSTABLE FRINIS Filed June 22. 1966
  • FIG; 2 THERMOGRAPHIC METHOD FOR PRODUCING THERNOSTABLE FRINIS Filed June 22. 1966
  • FIG; 2 THERMOGRAPHIC METHOD FOR PRODUCING THERNOSTABLE FRINIS Filed June 22. 1966
  • FIG; 2 THERMOGRAPHIC METHOD FOR PRODUCING THERNOSTABLE FRINIS Filed June 22. 1966
  • thermographic reproduction method in which a heatlabile reactant of a two-reactant color-forming system carried in a heat-sensitive layer of a heat-sensitive recording material is rendered non-reactive by exposure to a heat image of the information to be reproduced and unaifected reactant remaining in the unexposed areas of the layer are transferred to a copy material brought in contact therewith for reaction with the second reactant of the color-forming system provided on the copy material, producing on the copy material a colored image corresponding to the unexposed areas of the recording material.
  • the heat-sensitive material preferably includes heat-absorptive material uniformly distributed in heatconductive relation to the heat-sensitive layer, most preferably within the same layer, and the heat-absorptive material preferably converts electromagnetic radiation, especially infra-red radiation, to heat.
  • a recording material useful in the method which includes a heat-sensitive layer uniformly containing a heat-labile reactant of a color-forming system as well as a finely divided material adapted to absorb infra-red radiation and convert the same to heat.
  • the present invention relates to a method of recording and reproducing information by means of heat. More particularly the present invention relates to a thermographic method for producing thermostable prints.
  • a recording element containing a reactive compound or composition which is destroyed, blocked or reduced in reactivity or removed from the said element by the action of the image-wise or record-wise applied or induced heat.
  • the said compound or composition remains at disposal for reacting with a compound applied thereto or can be transferred to a receiving element eg by diffusion, tearing out, or vaporization so as to produce in the receiving material a change in physical or chemical character, e.g. a change in light absorption, a change in colour or colour density.
  • a change in colour can be produced by a colour coupling reaction, a change in colour density by a bleaching out reaction.
  • the heat to be supplied during the recording step can be supplied by conduction of thermal motion, e.g. from infra-red absorbing image-markings on an original to the heat-sensitive element, but is preferably produced in the heat-sensitive element itself by the conversion of electromagnetic radiation into heat in substances that are distributed in the heat-sensitive material and that are in heat-conductive contact with the compound or composition which has to be destroyed, blocked in reactivity or removed from the heat-sensitive element by heating.
  • a direct or reflectographic exposure technique can be used.
  • a reflectographic exposure technique is preferably applied and using a recording material containing in the recording element (e.g. layer) or in an element or coating in heat-conductive relationship therewith, a substance or substances that absorb the copying light, and convert it into heat.
  • the transparency of the recording material used for reiiectographic exposure is preferably such that at least 20% and at most of the copying light is transmitted.
  • Refiectographic exposure is possible when carrying out the present invention, not only when the information to be recorded is supplied as a visible light pattern but also when it is supplied as a pattern of infrared radiation if an element is used (whether forming part of the recording material or not) which transmits a certain amount of infra-red radiation but is selectively or dilferentially heated in view of the radiation reflected from the original (see Belgian patent specification 664,- 329).
  • substances that absorb copying light (or infrared radiation) and convert it into heat may if desired be present in and/or on a layer other than the thermosensitive layer of the thermo-sensitive material, provided there is sufficient thermal contact to conduct heat generated therein to the thermo-sensitive substances.
  • Such other layer may be another layer of the thermo-sensitive material or a layer (e.g. a self-supporting layer, or a supported layer or coating) forming or forming part of a material separate from the thermo-sensitive material, in other words a heat pattern can be firstly produced, in a separate element and conducted therefrom to the heatsensitive material.
  • a layer e.g. a self-supporting layer, or a supported layer or coating
  • a heat pattern can be firstly produced, in a separate element and conducted therefrom to the heatsensitive material.
  • the recording process according to the present invention comprises the following features:
  • the intensity of the exposure and the sensitivity of the recording element containing said radiation absorbing substances, which convert the applied radiation into heat are chosen in such a Way that on the absorption of the light or other rays directed to the original and striking undiiferentially the light-sensitive layer, the heating resulting therefrom, causes practically no or only a slight inactivation or loss of the reactive compound or composition.
  • the additional image-wise heat resulting from the image-Wise reflected radiation produces in the recording material the practically useful image-wise elimination of the said compound or composition.
  • the original to be reproduced when applying a reflectographic exposure technique the original to be reproduced must be an original containing image areas or an imagebackground that reflect(s) copying radiation, e.g., light or a transparency which has copying light absorbing image areas and which during the exposure is held with its back side in contact with or near proximity to a copying light reflecting material.
  • reflect(s) copying radiation e.g., light or a transparency which has copying light absorbing image areas and which during the exposure is held with its back side in contact with or near proximity to a copying light reflecting material.
  • a colour reactant or colour bleaching compound or composition which can be destroyed, blocked in reactivity or removed from the said element by heating, is applied with or without a binder to a suitable support.
  • the support may be permeable so that said compound or composition can be incorporated therein by impregnation.
  • a binder said binder can be chosen so that, in softened state, it can be transferred to a receiving material.
  • Suitable binders are ex. gelatin, carboxymethyl cellulose, tragacanth gum, alginic acid and the salts or esters thereof, poly(vinyl alcohol), poly(acryl amide), poly- 4 (vinyl pyrrolidone), ethylhydroxyethyl-cellulose, ethylcellulose, poly(vinyl butyral), cellulose triacetate, cellulose acetobutyrate, ethylcellulose-p-sulphonic acid benzoate, sucrose benzoate, poly(methyl methacrylate), polystyrene, polyethylene, polypropylene, poly(ethylene terephthalate), copoly(vinyl chloride/alkyl acrylate), copoly(nitrostyrene/maleic acid/monoethyl maleate), copoly(styrene/monoethyl maleate), copoly(vinyl methyl ether/maleic anhydride), copoly(maleic acid/nitrosty
  • binders e.g., a mixture of gelatin and carboxymethylcellulose, gelatin and polyethylene in emulsified state, ethylcellulose and carnauba wax.
  • the binder and the thermo-sensitive compound or composition are preferably dissolved in a common solvent. Binders insoluble in water may be dissolved in an appropriate organic solvent, but they may be used as an aqueous emulsion (latex) as well. Solvents, which can be utilised in preparing the heat-sensitive layer, are i.a. water, methanol, ethanol, ethylene glycol monomethyl) ether, methylene chloride, acetone, cyclohexanone, diethylene glycol, amyl acetate, dioxan, diethylene glycol monoethyl ether, trichloroethylene, toluene, or a mixture of at least two of the foregoing solvents.
  • the flexibility of the heat-sensitive layer can be secured by the use of plasticizers such as glycerol, sorbitol, polyglycols, polyethylene glycols, stearic acid and the esters thereof, esters of adipic acid and sebacic acid, polyethylene sebacate, polyethylene adipate, dimethylglycol phthalate, alkylaryl sulphonates, chlorinated diphenyl compounds, castor oil, pine oil, triphenyl phosphate, tricresyl phosphate, and dibutyl phthalate.
  • plasticizers such as glycerol, sorbitol, polyglycols, polyethylene glycols, stearic acid and the esters thereof, esters of adipic acid and sebacic acid, polyethylene sebacate, polyethylene adipate, dimethylglycol phthalate, alkylaryl sulphonates, chlorinated diphenyl compounds, castor oil, pine oil, triphenyl phosphat
  • Acids such as oxalic acid, and malonic acid.
  • Oxidising agents such as benzoyl peroxide,
  • Couplers for diazotype such as 2,3-dihydroxy-iiaphthalene, phloroglucinol and resorcino (5) i-phenyl-B-pyrazolidinone and derivatives such as l-phenyl-4-methyl-3-pyrazolidinone, and 1-(p-tolyl)-5-phenyl-3-pyrazolidinone.
  • Phenols and naphthols e.g. pyrocatechol, tert.-butyl-pyrocatech0l, pyrogallol, tort.- butyl-pyrogallol, 4-amino-1-naphthol, methoxy-I-naphthol, resorcinol, 2,3-dihydroxynaphthalene and 1,4-dlhydroxynaphthaone.
  • Inorganic and organic salts or soaps of iron, copper, silver, mercury, lead, nickel, cobalt and cadmium such as copper stearate, silver nitrate, silver stearate, silver behenate, silver palmitate, mercury stearate, lead acetate, lead stearate, lead myristate, nickel acetate, nickel stearate, cobalt stearate, cadmium stearate and lead benzyl mercaptide.
  • Aromatic diazo compounds e.g. the 4-(N,N-diethylamino)-benzene diazonium double salt with zinc chloride, p-nitrobenzene diazonium fluoroborate, and pdiethylaminobenzene-diazonium tetrafiuoroborate.
  • Silver salts such as silver nitrate and silver behenate, gold salts such as gold chloride and gold stearate, triazolium compounds such as 2,3-diphenylnaphtho-[1,2]- triazolium chloride and 2-pheriyl-3-(o-carboxy-phenyl)-naphtho-[1,2]-triazolium chloride, tetrazolium compounds such as 2,5-diphenyl-3-(o-carboxyphenyD- 2,l, 3,4 tetrazo lium chloride and 2,5-diphenyl-3-(p-rnethoxy-phenyl)-2,1,3,4-tetra- Z0lll. 1m chloride, leucophthalocyanines such as Phthalogene Blue IB (Farbenfabrikcn Bayer AG, Leverkusen. W. Germany).
  • leucophthalocyanines such as Phthalogene Blue IB (Farbenfabrikcn Bay
  • Inorganieand organic salts or soaps of iron, copper, silver, gold, cobalt and cadmium such as iron (III) chloride, iron (III) stearate, iron (II) chloride, iron (II) sulphate, 11011 (II) stearate, copper (II) chloride, copper (II) stearate, silver nitrate, silver behenate and cobalt (II) chloride.
  • Oxidising agents such as potassium dichromate and ammonium molybdate 5-bi omo-2-amino-thiazoles e.g. 2-ethylamin0-4-phenyl-5-bromothiazole and 2- diphenylaminoi-phenyl-fi-bromothiazole.
  • Amines such as p-phenylenediamine, Aromatic aldehydes and ketones eg; tetrachloroquinone, 1,4-naphthoquinone,
  • Aromatic amines and aromatic aminohydroxy compounds eg l-amino-Z-naphthol, S-hydroxy-quinolme, pphenylenediamine, and m-phenylenediamine.
  • Aromatic hydroxy compounds e.g. pyrogallol, galllc acid, methylaminophenosulphate, and 4-methoxy-1-naphthol.
  • -Metal salts e.g. iron (II sulphate and cobalt acetate.
  • Amines e.g. 2,5-diamino-toluene and benzylaniline.
  • Coupling agents for diazotype printing e.g. 3-hydroxy-2-naphthanilide and 3- hydroxy-N-2-naphthyl-2-naphthamide.
  • Sulphur-containing compounds e.g. sodium sulphide, sodium trithionate, thioacetamide and thiourea.
  • Silver salts ag. silver nitrate, silver behenate, silver stearate, gold salts e.g. gold (III) chloride and gold stearate.
  • Mercury salts e.g. mercury behenate.
  • Nitro compounds e.g. 2-nitro-4 chloroaniline, 1-chloro-2-nitro-4-diethyl sulphamoyl-benzene and dinitroresorcinol.
  • Metal salts eg. iron(III) chloride, iron(II) sulphate and cobalt acetate.
  • Oxidisable compounds such as 4-amlno-diphenylamine-2-sulphonic acid.
  • Mixtures of a diazonium salt and a coupler e.g. the combination of p-diethylamino-benzene diazonium tetrafluoroborate and phloroglucinol.
  • thermo-sensitive reactive compounds or composition e.g. infra-red and/or visible light absorbing pigments e. g. dispersable dyes.
  • pigments are more particularly mentioned: carbon black, graphite, oxides or sulphides of heavy metals having an atomic weight between 45 and 210, such as manganese, nickel and lead sulphide, or these heavy metals themselves in finely divided state such as silver, bismuth, lead, iron, cobalt and nickel.
  • thermosensi tive recording layer during the exposure with visible light, is in uniform heat-conductive relationship with coloured substances that absorb light of a determined part ofthe visible spectrum and convert it into heat;
  • a thermosensitive recording layer optically sensitised in this way can be used for recording coloured light patterns.
  • thermo-sensitive layer absorb preferably light corresponding to at least one of the primary colours (red, green, blue or subtractive colours (cyan, magenta, yellow).
  • Substances that absorb visible lightof a part of the visible spectrum and wherein absorbed lightenergy is converted into heat are e.g. dyes belonging to the classes of the azo dyes, the triarylmethane dyes, the xanthene dyes, the acridine dyes, the methine dyes, the azine dyes, the phthalocyanine dyes, the allied dyes.
  • these dyes are preferably used in finely; dispersed state.
  • the grain size of the dyes is preferably lower than 0.1
  • Therecording material normally has an optical density of between :05 and 1.50; in the case of reflectographic exposure it preferably has an optical density for the light to be absorbed of between 0.20 and 0.80.
  • reaction compounds in the heat-sensitive layer are preferably used in an amount of 10'- to mol per sq.m.
  • the support (if any) for the heat-sensitive element is selected dependent upon the exposure technique applied, for example, according to whether contact printing, in which the radiation is transmitted through the original to the heat-sensitive layer or reflex printing, in which the radiation is transmitted through the heat-sensitive layer to the original, is used. In the latter case the support should absorb as little copying light as possible. If the heat-sensitive element is a self-supporting layer, it is of course not necessary for the recording: material to comprise a support from such layer.
  • the original which is a transparency
  • the heat-sensitive layer taking care that there is created no heat-conductive relationship of the image-markings with the heat-sensitive layer or such heat-conductive relationship is only created to a minor extent (e.g. by applying no pressure).
  • the heat-sensitive layer contains a substance absorbing the copying light and converting it into heat.
  • the transparent document possessing light-absorbing characters which are heated by the absorbed light, is placed with itscharacters in thermal contact with the heat-sensitive layer, which, in that case, is sufliciently transparent for the copying light.
  • the original e.g. a line copy is placed with the image bearing surface in thermal contact with the heat-sensitive layer and exposure takes place through the latter.
  • the heat-sensitive layer during reflectographic exposure does not stand in real thermal contact with the original, which is chosen in such a way that it image-wise reflects the copying light or contains a back-ground reflecting that light.
  • the heat-sensitive layer is in uniform thermal contact with a substance or substances that absorb(s) the copying light and convert(s) it into heat and that is or are present on and/ or in either an element of the heatsensitive material or a separate element that e.g. forms partof the copying apparatus.
  • an apparatusv and separate element reference is made to Belgian patent specification 664,329.
  • the heat-sensitive compound or composition which remained intact i.e. which is still present, after the imagewise exposure to heat, can be developed on the recording material itself or transferred to a receiving material containing a reactant for said compound or composition-The transfer can be carried out by means of a liquid or by non-differentially supplying an amount of non-destructive heat in order to vaporize or melt the thermosensitive image-forming compound or composition so that it can diffuse in that state to the receiving material.
  • the non-destructive heat preferably effects in the heatsensitive element an increase of temperature comprised between 50 and 250 C.
  • the effectiveness of the recording with electromagnetic radiation substantially depends on the intensity of the radiant energy.
  • a recording layer that does not provide a sufficient differentiation in concentration of thermo-sensitive reactive compound or composition with a particular source of electromagnetic radiation energy may be fully effective if the energy level is substantially increased.
  • Radiant energy of a brief duration and of high intensity is preferably used.
  • Lamp structures and systems capable of providing high-intensity radiation in a very small lapse of time are well known per se.
  • Light sources with high radiation intensity and relatively short exposure time are the' so-called flash lamps and more particularly the discharge lamps containing an inert gas.
  • a xenon gas discharge lamp which can supply an energy of 300-3000 watt. sec. in a time interval of to 10* seconds. More details about a copying apparatus containing such a discharge lamp can be found in Belgian patent specification 664,868.
  • the intensity of emitted light is high in the infra-red and particularly high in the regions of the visible spectrum. Temperatures up to 400 C. can be easily obtained in the radiation absorbing substances by applying high intensity flash exposure.
  • the invention includes the recording of heat patterns heat of which is absorbed in the thermo-sensitive element or layer, and that it is possible to form a heatabsorbing image in the recording material itself eg if this material is provided with a light-sensitive silver halide layer or a layer in which a silver-containing image can be formed by diffusion transfer.
  • Example 1 To a cellulose triacetate support a heat-sensitive coating is applied, which coating is prepared as follows:
  • the heat-sensitive material 39 is laid with its v heat-sensitive layer 41 on a graphic opaque original 42,
  • the transparent cellulose triacetate support 40 is directed towards a flash-exposure lamp 43 containing xenon gas.
  • the electronic flash produces a light-intensity of 1600 watt. sec.
  • the heat-sensitive material After flash-exposure the heat-sensitive material is brought into contact with a receiving paper and led between a pair of rollers as illustrated in FIG. 2.
  • the exposed heat-sensitive material 39, and the receiving material 36 are pressed together between the rollers 37 and 38, the former roller being heated to a temperature of 130 C.
  • Example 2 Example 1 is repeated with the difference, however, that in the heat-sensitive layer the amount of thioacetamide is replaced by a same amount of oxalic acid.
  • Example 3 Example 4 Example 1 is repeated with the difference, however, that in the heat-sensitive layer the amount of thioacetamide is replaced by a same amount of p-phenylenediamine.
  • This heat-sensitive coating has an optical density, measured in transmission, of 0.61.
  • the receiving material is prepared by coating a paper of 90 g. per sq. m., pro rata of 13.5 sq. to. per kg., with the following composition:
  • Example 6 Example 5 is repeated with the difference, however, that the amount of N-nitroso-diphenylamine is replaced by a same amount of tert. butyl-pyrogallol and that the amount of gallic acid in the receiving material is replaced by a same amount of iron(II) stearate.
  • a legible, positive, purple-grey print of the original is obtained.
  • Example 7 Example 5 is repeated with the ditference, however, that the amount of N-nitroso-diphenylamine is replaced by a same amount of phloroglucinol and that the amount of gallic acid in the receiving material is replaced by a same amount of pdiethylaminobenzene diazonium tetra fiuoroborate.
  • a legible, positive, brown-grey print of the original is obtained.
  • Example 8 Example 5 is repeated with the difierence, however, that the amount of N-nitroso-diphenylamine is replaced by ,a same amount of 4-methoxy-l-naphthol and that the material described as such in Example 4 is used as receiving material.
  • a legible, positive, green print of the original is obtained.
  • the carbon black is excluded from the recording material, no image-differentiation is obtained on the receiving material.
  • the receiving material becomes uniformly green coloured. If the carbon black in the recording material is replaced by 0.5 cc. of a 10% ethanolic solution of erythrosine, a known optical sensitizing dye, no imagedifferentiation can be obtained also, even not by increasing the added amount of sensitizing solution to 5 cos.
  • Example 10 Example 5 is repeated with the difierence, however, that the amount of N-nitroso-diphenylamine is replaced by a same amount of p-phenylenedithiourea and that a paper as described in Example 4 is used as receiving material. After having been dried, the recording material possesses an optical density, measured in transmission, of 0.29.
  • a legible, positive, brown print of the original is obtained.
  • Example 11 Example 5 is repeated with the ditference, however, that the amount of N-nitroso-diphenylamine is replaced by a same amount of 1,3-diphenyl-triazene and that the amount of gallic acid in the receiving paper is replaced by a same amount of 3-hydroxy-N-2naphthyl-2-naphthamide.
  • a legible, positive, orange-red print of the original is obtained.
  • a glassine-type paper weighing 60 g. per sq. m. is coated with a heat-sensitive layer from the following composition:
  • Example 13 To a poly(ethy1ene terephthalate) support a heat-sensitive coating is applied from the following composition:
  • the heat-sensitive material After having been dried the heat-sensitive material possesses an optical density, measured in transmission, of 0.54.
  • the suspension is coated in such a Way that an amount of silver behenate corresponding to 0.15 of silver is present per sq. m.
  • a legible, positive, brown print of the original is obtained when proceeding as described in Example 1.-
  • Example 14 Example 13 is repeated with the difference, however; that the amount of carbon black in the heat-sensitive ma: terial is replaced by a same amount of finely divided nickel sulphide.
  • a legible, positive, brown print of the original is obtained.
  • Example 15 Example 13 is repeated with the difference, however, that the amount of carbon black in the heat-sensitive material is replaced by a same amount of Indigo Blue (0.1. 73,000).
  • a legible, positive, brown print of the original is obtained on the receiving material.
  • Example 16 is repeated with the difference, however, that the amount of dithiooxamine in the heat-sensitive material is replaced by a same amount of tert.-butylpyrocatechol.
  • a legible, positive, brown print of the original is obtained on the receiving material.
  • Example 17 Example 13 is repeated with the difference, however, that the amount of dithiooxamide in the heat-sensitive material is replaced by a same amount of 1-phenyl-3- pyrazolidinone. By repeating the transfer step five times, each time with another image receiving blank, five sharp prints of the original can be obtained.
  • Example 18 A cellulose triacetate support, provided with a subbing layer for a hydrophilic colloid layer, is coated with a heat-sensitive layer from the following composition:
  • Example 19 Example 1 is repeated with the difference, however, that the heat-sensitive layer is exposed by transmission through a silver image transparency.
  • a heat-sensitive recording material including a heat-sensitive layer uniformly containing a color-forming reactant which is affected by heat of sufiicient intensity and is selected from the group consisting of compounds which are destroyed by heat, compounds which are blocked in reactivity by heat, and compounds which are removed by heat, to a heat image of the information to be reproduced of sufficient intensity to affect said reactant in the heated areas; bringing the heat-sensitive layer of said exposed heatsensitive material into effective contact with a copy material having the other of said color-forming reactants uniformly distributed thereon; and transferring at a temperature below that at which said first reactant is affected at least a portion of said first reactant from the unexposed and unheated areas of said heat-sensitive material to said copy material, the transferred first reactant reacting with the second reactant to produce on the copy sheet a colored image corresponding to the unexposed areas of said heat
  • said heat-sensitive layer includes a binding agent adapted to soften upon heating a stratum of said layer containing said first reactant is bodily transferred to said copy material to produce said color-forming reaction.
  • said heat-sensitive layer includes in heat conductive relation to said heatsensitive layer a vmaterial adapted to absorb and convert electromagnetic radiation into heat and said heat-sensitive material is exposed to an image of said radiation.
  • the heatsensitive layer contains a reactive compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, 1,3- diphenyltriazene, tetrachloroquinone and 4-methoxy-lnaphthol.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US559487A 1965-06-22 1966-06-22 Thermographic method for producing thermostable prints Expired - Lifetime US3476578A (en)

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GB26468A GB1160223A (en) 1965-06-22 1965-06-22 Improvements in or relating to a Thermographic Method for Producing Thermostable Prints

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BE (1) BE682768A (enrdf_load_stackoverflow)
CH (1) CH511722A (enrdf_load_stackoverflow)
DE (1) DE1571819A1 (enrdf_load_stackoverflow)
FR (1) FR1496154A (enrdf_load_stackoverflow)
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642475A (en) * 1967-10-02 1972-02-15 Agfa Gevaert Nv Method of recording and reproducing information
US3811773A (en) * 1965-11-26 1974-05-21 Agfa Gevaert Nv Thermographic copying
US3855928A (en) * 1970-02-27 1974-12-24 American Screen Process Equip Method and apparatus for printing
USB322621I5 (enrdf_load_stackoverflow) * 1969-05-06 1975-01-28
US3978247A (en) * 1974-01-28 1976-08-31 Rca Corporation Transfer recording process
US4000334A (en) * 1971-07-15 1976-12-28 Energy Conversion Devices, Inc. Thermal imaging involving imagewise melting to form spaced apart globules
US4032691A (en) * 1974-03-22 1977-06-28 Fuji Photo Film Co., Ltd. Recording material
US4115613A (en) * 1975-12-29 1978-09-19 Process Shizai Co., Ltd. Heat-sensitive recording materials and recording process of using the same
US4137078A (en) * 1976-09-23 1979-01-30 Energy Conversion Devices, Inc. Method of continuous tone imaging using dispersion imaging material
US4138522A (en) * 1974-09-17 1979-02-06 Fuji Photo Film Co., Ltd. Color image forming system including a layer formed from a dried residue of a developing ink containing a polyester resin binder
US4165741A (en) * 1975-12-29 1979-08-28 Process Shizai Co., Ltd. Heat-sensitive recording materials and recording process of using the same
US4199615A (en) * 1974-09-18 1980-04-22 Energy Conversion Devices, Inc. Dry-process imaging film and method
US4267261A (en) * 1971-07-15 1981-05-12 Energy Conversion Devices, Inc. Method for full format imaging
DE3319738A1 (de) * 1982-05-31 1983-12-01 Nippon Telegraph & Telephone Public Corp., Tokyo Optisches aufzeichnungsmedium und verfahren zu seiner herstellung
EP0351875A3 (en) * 1988-07-22 1990-09-26 Jujo Paper Co., Ltd. Composition for the preparation of a near ir absorbing material and molded articles containing this composition or this material
US20110300360A1 (en) * 2010-06-08 2011-12-08 King Abdulaziz City Science And Technology High dose film dosimeter based on nitro blue tetrazolium and polyvinyl butyral for radiation processing
US9932959B2 (en) 2011-03-10 2018-04-03 King Abdulaziz City For Science And Technology Shrounded wind turbine configuration with nozzle augmented diffuser

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8408259D0 (en) * 1984-03-30 1984-05-10 Ici Plc Printing apparatus
JPS62216790A (ja) * 1986-03-19 1987-09-24 Kao Corp 熱転写記録用インクシ−ト

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916395A (en) * 1958-07-21 1959-12-08 Minnesota Mining & Mfg Heat-sensitive copy-paper
US2936247A (en) * 1957-06-19 1960-05-10 Caribonum Ltd Transfer sheets for forming thermosensitive copies
US2992121A (en) * 1957-05-16 1961-07-11 Caribonum Ltd Thermosensitive colouring materials
US3210544A (en) * 1963-08-01 1965-10-05 Printing Arts Res Lab Inc Method of thermographic reproduction wherein a vaporizable conditioner changes the physical characteristics of a conversion sheet coating
US3223838A (en) * 1962-10-16 1965-12-14 Konishiroku Photo Ind Method for the preparation of relief images by the use of a heat-sensitive sheet
US3238047A (en) * 1960-11-21 1966-03-01 Itek Corp Data processing media
US3262386A (en) * 1959-11-23 1966-07-26 Little Inc A Duplicating method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992121A (en) * 1957-05-16 1961-07-11 Caribonum Ltd Thermosensitive colouring materials
US2936247A (en) * 1957-06-19 1960-05-10 Caribonum Ltd Transfer sheets for forming thermosensitive copies
US2916395A (en) * 1958-07-21 1959-12-08 Minnesota Mining & Mfg Heat-sensitive copy-paper
US3262386A (en) * 1959-11-23 1966-07-26 Little Inc A Duplicating method
US3238047A (en) * 1960-11-21 1966-03-01 Itek Corp Data processing media
US3223838A (en) * 1962-10-16 1965-12-14 Konishiroku Photo Ind Method for the preparation of relief images by the use of a heat-sensitive sheet
US3210544A (en) * 1963-08-01 1965-10-05 Printing Arts Res Lab Inc Method of thermographic reproduction wherein a vaporizable conditioner changes the physical characteristics of a conversion sheet coating

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811773A (en) * 1965-11-26 1974-05-21 Agfa Gevaert Nv Thermographic copying
US3642475A (en) * 1967-10-02 1972-02-15 Agfa Gevaert Nv Method of recording and reproducing information
USB322621I5 (enrdf_load_stackoverflow) * 1969-05-06 1975-01-28
US3920863A (en) * 1969-05-06 1975-11-18 Minnesota Mining & Mfg Method of providing and developing hidden entries
US3855928A (en) * 1970-02-27 1974-12-24 American Screen Process Equip Method and apparatus for printing
US4000334A (en) * 1971-07-15 1976-12-28 Energy Conversion Devices, Inc. Thermal imaging involving imagewise melting to form spaced apart globules
US4267261A (en) * 1971-07-15 1981-05-12 Energy Conversion Devices, Inc. Method for full format imaging
US3978247A (en) * 1974-01-28 1976-08-31 Rca Corporation Transfer recording process
US4032691A (en) * 1974-03-22 1977-06-28 Fuji Photo Film Co., Ltd. Recording material
US4138522A (en) * 1974-09-17 1979-02-06 Fuji Photo Film Co., Ltd. Color image forming system including a layer formed from a dried residue of a developing ink containing a polyester resin binder
US4199615A (en) * 1974-09-18 1980-04-22 Energy Conversion Devices, Inc. Dry-process imaging film and method
US4165741A (en) * 1975-12-29 1979-08-28 Process Shizai Co., Ltd. Heat-sensitive recording materials and recording process of using the same
US4115613A (en) * 1975-12-29 1978-09-19 Process Shizai Co., Ltd. Heat-sensitive recording materials and recording process of using the same
US4137078A (en) * 1976-09-23 1979-01-30 Energy Conversion Devices, Inc. Method of continuous tone imaging using dispersion imaging material
DE3319738A1 (de) * 1982-05-31 1983-12-01 Nippon Telegraph & Telephone Public Corp., Tokyo Optisches aufzeichnungsmedium und verfahren zu seiner herstellung
US4585722A (en) * 1982-05-31 1986-04-29 Nippon Telegraph & Telephone Public Corporation Optical recording media with thermal coloration and process for producing same
EP0351875A3 (en) * 1988-07-22 1990-09-26 Jujo Paper Co., Ltd. Composition for the preparation of a near ir absorbing material and molded articles containing this composition or this material
US20110300360A1 (en) * 2010-06-08 2011-12-08 King Abdulaziz City Science And Technology High dose film dosimeter based on nitro blue tetrazolium and polyvinyl butyral for radiation processing
US9234081B2 (en) * 2010-06-08 2016-01-12 King Abdulaziz City For Science And Technology Method of manufacturing a nitro blue tetrazolium and polyvinyl butyral based dosimeter film
US9932959B2 (en) 2011-03-10 2018-04-03 King Abdulaziz City For Science And Technology Shrounded wind turbine configuration with nozzle augmented diffuser

Also Published As

Publication number Publication date
CH511722A (de) 1971-08-31
FR1496154A (fr) 1967-09-29
DE1571819A1 (de) 1970-04-02
BE682768A (enrdf_load_stackoverflow) 1966-12-20
NL6608615A (enrdf_load_stackoverflow) 1966-11-25
GB1160223A (en) 1969-08-06

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