US3520691A - Heat-developable diazotype material - Google Patents
Heat-developable diazotype material Download PDFInfo
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- US3520691A US3520691A US623340A US3520691DA US3520691A US 3520691 A US3520691 A US 3520691A US 623340 A US623340 A US 623340A US 3520691D A US3520691D A US 3520691DA US 3520691 A US3520691 A US 3520691A
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- Prior art keywords
- heat
- paper
- diazotype
- sensitive layer
- weight
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- 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
- G03C1/60—Compositions containing diazo compounds as photosensitive substances with macromolecular additives
Definitions
- a heat-developable diazotype material is prepared by including a heat-sensitive, alkali-generating beta-aminodicarboxylic acid with a two-component diazotype composition. Application of heat to such material provides alkaline environment conducive to dye-forming coupling of diazotype components.
- Heat-developable two-component materials which carry, besides the light-sensitive layer, components which generate gaseous ammonia or volatile amines when heated. These substances penetrate into the light-sensitive layer, render it alkaline, and thus initiate the coupling process so that a dyestuit is formed.
- the various reproduction materials based on this principle which so far have become known differ in their alkalizing systems and in the position of the heat-sensitive layer with respect to the support and the light-sensitive layer.
- thermolabile systems in heat-sensitive diazo materials.
- Urea has also been used as thermolabile substance yielding gaseous ammonia.
- acid amides in admixture with slightly soluble inorganic bases in heatdevelopable reproduction materials.
- the heat-sensitive layer is preferably applied to the back of the support. Further, it has been suggested to apply the heat-sensitive layer in the form of two separate layers and to dispose the substances capable of generating volatile alkali by reaction with each other separately in these two layers.
- the storability of the materials is of decisive importance. Under normal atmospheric conditions, the materials should be capable of being stored for at least 6 months before a discoloration due to premature coupling becomes visible. This requirement particularly is not met satisfactorily by any of the hitherto known heatdevelopable diazotype materials.
- the invention provides a heat-developable diazotype material which comprises a support, a light-sensitive layer, a heat-sensitive layer and, if desired, intermediate layers, and wherein the layers contain at least one diazo compound, one coupling component with acid additives and a component which generates a volatile base when heated, and, if desired, a binder, said substances being contained in the layers either individually or in admixture with each other.
- the material is characterized in that the heat-sensitive layer contains, as the component which generates a volatile base when heated, at least one beta-aminodicarboxylic acid or a monometal salt of such acid corresponding to the general formula wherein R stands for hydroxyl, alkyl, alkenyl, cycloalkyl, aralkyl or phenacyl groups which may be substituted,
- R and R may be the same or difierent and stand for hydrogen, alkyl, alkenyl, cycloalkyl, or aralkyl groups which may be substituted, or R and R form an, optionally substituted, heterocyclic ring with the nitrogen atom to which they are attached.
- a number of suitable beta-aminodicarboxylic acids and their decomposition temperatures are listed in the table below.
- the decomposition temperatures of these compounds range from about 70 to C., thus complying with the requirement that no temperatures higher than 150 C. must be applied during heat development. As a rule, the decomposition temperatures of the corresponding monometal salts are not very different.
- the monosalts of alkali metals and alkaline earth metals and those of zinc and aluminum are preferred. It is not necessary to incorporate the metal salts themselves in the coating composition.
- the free beta-aminodicarboxylic acids may also be used with an alkaline compound of the metal. In the case of metals which form slightly soluble oxides, the free acids are preferably applied in admixture with the oxide. Strongly oxidizing or reducing oxides should not be used, however. Favorable results are obtained when the heat-sensitive layer contains zinc oxide in admixture with one or more free beta-aminodicarboxylic acids.
- beta-aminodicarboxylic acids decompose under heat action in accordance with the following equation:
- a remarkable feature of the heat-developable diazotype materials with beta-aminodicarboxylic acids in the heatsensitive layer as substances which generate the volatile base is the wide range of variations in the arrangement of the heat-sensitive layer with respect to the other layers and in the combination of the single components.
- a material may be prepared as in FIG. 1, e.g., Whose heatsensitive layer 5 consists only of one or more beta-aminodicarboxylic acids of the above formula and a binder.
- the layer 5 may also contain the coupling component, so that, in this case, the light-sensitive layer 7 contains only the diazo compound and the acid additives.
- the position of the heat-sensitive layer with respect to the support and the light-sensitive layer has normally been of critical importance, this is much less the case with the reproduction material of the present invention.
- the light-sensitive and the heat-sensitive layer may be in contact with each other, i.e. they may be disposed on the same side of the support as in FIGS. 1 and 2. This arrangement is preferred in the case of gas-impermeable supports, but it can be employed also with gas-permeable supporting materials.
- the heat-sensitive layer 5 is normally disposed as in FIG. 1, between the support 3 and the light-sensitive layer 7.
- the heat-sensitive layer contains preferably free beta-aminodicar-boxylic acids. If monometal salts of beta-aminodicarboxylic acids are to be used, it is advisable to provide between the heat-sensitive and the light-sensitive layers 15, 17 (FIG. 3), an intermediate barrier layer 19 which consists either of a meltable or thermoplastic resin, of a wax, or of highly polymerized organic substances.
- the intermediate layer 19 should be thin enough to be penetrated by the gas which is generated. Normally, it should have a thickness of only a few microns.
- the light-sensitive layer 27 and the heat-sensitive layer 25 are preferably disposed separately, on opposite sides of the support 23, as in FIG. 4.
- the gas generated by heat influence diffuses through the support into the light-sensitive layer.
- the light-sensitive layer 27 must contain the diazo compound and the coupling component.
- beta-aminodicarboxylic acids are preferably used which split off ammonia or aliphatic amines with high gas pressure when heated.
- Compounds in which the radicals R and R in the above general formula stand for hydrogen or alkyl groups having together not more than 8 carbon atoms are particularly suitable.
- the heat-sensitive layer 25 contains not only the free beta-aminodicarboxylic acid, but also zinc oxide. It is pointed out that when an intermediate layer 28 is employed which contains ammonium salts, even such beta-aminodicarboxylic acids may be used with good results in which the radicals R and R stand for alkyl residues with particularly long chains.
- Suitable supports for the above described layers are sheet-like materials of very different nature. Paper supports are preferred. The paper used may be completely opaque or slightly transparent. Coated papers or plastic films, such as films of cellulose acetate, cellulose acetobutyrate, polyesters, cellulose hydrate or polyamides, may also be used. Woven and non-woven textiles may also be used, provided they are dense enough.
- the light-sensitive layer is a two-component layer of the kind customary in diazotype materials. It may contain any of the known combinations of diazo compounds and coupling components. Therefore, a preferred method for preparing the reproduction material of the invention consists in providing a commercially available diazotype material of the customary type, which normally would be developed by the action of ammonia, with an additional heat-sensitive layer 5', as in FIG. 2.
- Suitable binders for the beta-aminodicarboxylic acids contained in the heat-sensitive layer are, inter alia: polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, formylpolyvinylacetal, butyryl polyvinylacetal, rice starch, and cellulose derivatives, such as carboxymethyl cellulose or ethyleellulose of medium viscosity.
- binders having the required solubility characteristics are selected.
- dispersions of the above-mentioned synthetic substances may be applied, in particular in connection with the preferred aqueous coatings.
- the beta-aminodicarboxylic acids may also be dispersed or dissolved. Particularly good results are obtained with heat-sensitive layers on which the beta-aminodicarboxylic acids have been coated in disperse form. Therefore, beta-aminodicarboxylic acids of poor solubility may be used.
- the mixing proportions of binder and beta-aminodicarboxylic acid should be such that the heat-sensitive layer contains 0.25 to 1 part by weight of binder per part by weight of beta-aminodicarboxylic acid. Advanttageously, the weight of the heat-sensitive layer ranges from 2 to 3 g./m. However, values considerably above or below this range are also possible, depending on the composition and arrangement of the heat-sensitive layer.
- the heat-developable diazotype material according to the present invention is prepared in known manner, using known techniques. As mentioned above, it is a preferred method to coat a normal two-component diazotype material suitable for dry-development on its back with a solution or dispersion containing the substance which generates the alkaline substance. It has proved to be advantageous, when applying this method, to add suitable additives to the heat-sensitive composition in order to prevent it from penetrating into the support and thus contacting the opposite layer. Auxiliaries suitable for this purpose are, e.g., aqueous dispersions of finely divided surface-active silica with an organic polymer as the binder. The layer is applied by means of known coating methods. The material is then dried at a temperature at least 20 C. below the point where the specific betaaminodicarboxylic acid used decomposes, splitting off an amine.
- Processing of the diazotype material is simple and is done in the usual manner. After image-wise exposure of the reproduction material under a master, it is heated to temperatures above the decomposition temperature of the substance generating the volatile amine which is contained in the heat-sensitive layer, but not higher than 150 C. Preferably, such substances are applied which render it possible to develop the reproduction material at temperatures ranging from 90 to 130 C.
- the time of exposure to the elevated temperature ranges from 5 to 30 seconds. Heating may be effected, e.g., by means of heated plates or rolls or by the application of infrared radiators.
- the reproduction material of the present invention may also be used in a thermographic reproduction process, when the supports used are sufficiently thin and transparent.
- the copy is produced by the image-wise action of heat.
- a master with writing on one side is disposed between an infrared source and the reproduction material in such a manner that the surface of the master which carries the image is in contact with the heat-sensitive layer of the reproduction material.
- the degree of heating is suflicient to decompose the thermolabile substance.
- the copies prepared in this manner are fixed by a subsequent exposure to light, by which the unreacted diazo compound is destroyed. Otherwise, a second discoloration would take place when the material is exposed to a second heat treatment.
- the diiferent variations of the thermographic process known may also be performed with the reproduction material according to the invention.
- the diazotype material of the invention may be developed in known manner by the so-called dry process. For this purpose, it is image-wise exposed and then placed in an ammonia atmosphere, similarly to normal two-component diazotype material suitable for drydevelopment.
- the reproduction material according to the invention can be easily prepared and processed. It may be developed by a simple heating and yields copies with exceptionally good contrast. The outstanding storability of the material, which will be shown in detail in the following examples, deserves particular mention.
- FIGS. 1 and 2 show the sequence of layers employed with permeable or impermeable support sheets
- FIG. 3 shows the use of a thermoplastic barrier layer advisable when employing salts of the amino compounds of the invention
- FIG. 4 shows construction of material employing permeable supports
- FIG. 5 shows the use of ammonium salts with heatsensitive layers including long chain amino compounds of the invention.
- Example 1 White base paper customarily used for diazotype purposes is precoated on one surface with an aqueous dispersion of finely divided silica and casein, dried, and then an aqueous solution of the following composition is applied to the same side:
- the sensitized paper is dried at a temperature between 70 and 80 C., and the back of the paper is then coated with a suspension obtained by grinding 10 parts by weight of (fl-N,N-dimethylamino-methyl)- benzyl-malonic acid 2 parts by weight of finely divided silica, and
- the suspension is prepared by grinding the compounds in a ball or colloid mill until the ,B-aminodicarboxylic acid is pulverized to a particle size of about 5 to 15
- a sheet of the diazotype paper prepared in this way is image-wise exposed under the master until the diazo compound has bleached out under the transparent areas of the master.
- the material is then contacted for a short time with rolls or plates maintained at a temperature of -135 C.
- a color is formed in the unexposed areas of the paper.
- the copy thus obtained is very rich in contrast and shows a strong, dark-blue azo dyestufr image on a clear white background.
- the unexposed diazotype paper can be stored up to three days at a relative humidity of 65% and a temperature of 42 C., without coupling taking place. A weak discoloration can be observed only after three days. This means that the material can be stored considerably longer than 6 months under normal climatic conditions.
- Example 2 A base paper customarily used in diazotype processes is precoated on one surface with an aqueous dispersion of finely divided silica and casein, dried, and then coated, on the same side, with an aqueous solution of the following composition:
- the sensitized paper is dried in the normal manner and the back of the paper is then coated with a suspension of the following composition:
- the suspension is prepared by grinding in a ball or colloid mill.
- a sheet of the diazotype paper thus prepared is exposed under a master and developed as described in Example 1.
- a copy produced shows a strong, dark blue image on a clean white background.
- the material can be stored for 3 days at a relative humidity of 65% and a temperature of 42 C., and weak coupling effects can be observed only after this period of time. This proves that the shelf-life of this material at normal temperature is sufiicient.
- Example 3 Normal diazotype base paper which has been precoated as described in Examples 1 and 2 is coated with a solution containing:
- Ethylcellulose T 200 Hercules Powder Company, U.S.A.
- a sheet of the diazotype material prepared in this manner is image-wise exposed under a master and developed as described in Example 1.
- the copy produced shows an extremely strong, dark blue image on a white background.
- a copy prepared on the same material by development with gaseous ammonia shows an image in the same color.
- the material can be stored for 2 /2 days at a relative humidity of 65% and a temperature of 42 C., practically no coupling taking place, and is thus sufiiciently storable at temperatures around 20 C.
- Example 4 White base paper customarily used for diazotype processes is precoated on one surface with an aqueous dispersion of finely divided silica and polyvinyl acetate and the same side is then coated with an aqueous solution having the following composition:
- Zinc chloride 1.1 Aluminum sulfate 05 Naphthalene-1,3,6-trisulfonic acid (sodium salt) Thiourea 2.5 Saponine 0.02 Isopropanol 2.0 Zinc chloride double salt of 4-morpholino-2,5-diethoxy-benzene-diazonium chloride 1.2 1[(2 N,N diethylamino) carbanilido]-3,5dihydroxy 4-bromo-benzene 1.2
- the sensitized paper is dried in the usual manner and the back of the paper is then coated with a suspension prepared by grinding 10 parts by weight of (ti-N,N-diethylamino-methyl)- benzyl-malonic acid, and
- the paper thus produced is dried at 35-40 C. in an air current.
- a sheet of the highly light-sensitive diazotype paper thus prepared is image-wise exposed and then contacted for a short time with rolls or plates heated to a temperature of C.
- the copy thus produced is exceptionally rich in contrast and shows a strong, slightly bluetinged red image on a clear white background.
- the unexposed diazotype material may be stored up to 3 days at a relative humidity of 65% and a temperature of 42 C. with practically no coupling taking place, and thus possesses good storability under normal conditions.
- Example 5 A transparent paper customarily used for diazotype purposes is precoated with a suspension prepared by grinding 5 parts by weight of (fl-N,N-di-n-propylamino-methyl) benzyl-malonic acid,
- Example 6 A transparentized paper customarily used as support in diazotype processes is coated with a suspension which was prepared by grinding 5 parts by weight of (B-N,N-dimethylamino-methyl)- benzyl malonic acid,
- the precoated paper is dried in an air current at 3040 C. and the same side is then provided with a solution of 3 parts by weight of Ethylcellulose T 200 (Hercules Powder Company, USA.) in 100 parts by weight of ethyl acetate,
- Citric acid 2 Methylcellulose having a viscosity of cps. at C.
- thermographic copying apparatus between the infrared source and the diazotype material in such a manner that the written side of the original is either in contact with the light-sensitive layer of the diazotype material or with the side opposite the light-sensitive layer of the diazotype material.
- the undecomposed diazo compound is destroyed by subsequent exposure to light.
- a strong, brown-black copy is obtained.
- the dyestuif formed in the image areas is impermeable for ultraviolet light, so that the copy may be used as intermediate original from which further copies may be produced on diazotype material.
- Example 7 A base paper customarily used in diazotype processes is precoated with a suspension obtained by grinding 10 parts by weight of (fi-N,N-dimethylaminomethyl)- ethyl-malonic acid,
- a sheet of the diazotype paper prepared in this manner is image-wise exposed and then contacted for a short time with rolls or plates heated to -115 C.
- the copy thus obtained is very rich in contrast and shows a strong, dark blue image on a pure white background.
- Example 8 White base paper customarily used for diazotype purposes is precoated on one side with an aqueous dispersion of finely divided silica and casein, dried, and the same side of the paper is then coated with an aqueous solution of the following composition:
- the sensitized paper is dried in the usual manner and the back of the paper support is then coated with a solution of the following composition:
- the paper is again dried at 5055 C.
- a sheet of the diazotype paper thus prepared is imagewise exposed under a master and then contacted for a short time with rolls or plates having a temperature of -130 C.
- the copy thus produced is rich in contrast and shows a dark blue azo dyestufi image on a white background.
- Example 9 One side of a base paper customarily used for diazotype purposes is precoated with an aqueous dispersion of finely divided silica and casein, dried, and the same side of the material is then coated with an aqueous solution having the following composition:
- Naphthalene-1,3,6-trisulfonic acid (sodium salt) 2.5 Thiourea 5.0 Saponine 0.02 Alizarin Irisol RL 0.02 2,3-dihydroxynaphthalene-6-sulfonic acid (sodium salt) 2.6 Zine chloride double salt of 4-N,N-dimethylaminobenzene diazonium chloride 1.35
- the sensitized paper is dried in the usual manner and the back of the paper is then coated with a solution obtained by dissolving Example 10
- a white base paper of the kind customarily used in diazotype processes is precoated with an aqueous dispersion of finely divided silica and polyvinyl acetate and the same side of the material is then coated with an aqueous solution of the following composition:
- the sensitized paper is dried in the usual manner and the back of the paper is then coated with a suspension obtained by grinding Parts by weight (13-N,N-dimethylamino-methyl -benzyl-malonic acid 10 Zinc oxide Finely divided silica 2 Carboxymethylccllulose cp./ C.) 2.5 Polyvinylacetate dispersion (Mowilith DMC 2- Farbwerke Hoechst A.G.) 4 Water 100 The paper thus obtained is dried at 5560 C.
- a sheet of the highly light-sensitive diazotype paper thus produced is image-wise exposed and then shortly contacted with rolls or plates heated to 125130 C.
- the copy obtained is exceptionally rich in contrast and shows a strong, dark blue image on a 'white background.
- the unexposed diazotype material may be stored for 3 days without coupling at a relative humidity of 65% and a temperature of 42 C; at a relative humidity of and a temperature of 20 (3., it can be stored for half a year.
- Example 11 A base paper of the kind customarily used in diazotype processes is precoated with an aqueous dispersion of the following composition:
- Example 8 After drying, the same side of the material is sensitized by means of the solution used in Example 8, dried again, and then the back of the paper is coated with the aqueous suspension used in Example 2. The coated paper is then dried at 55-60 C.
- a sheet of the diazotype paper thus produced is imagewise exposed in the normal manner and then brought into contact with rolls or plates having a temperature of C.
- the copy thus produced shows a strong, bluishblack image on a white background.
- Heat-developable diazotype material comprising:
- a light-sensitive layer on said support comprising a light-sensitive diazonium compound and an acidic stabilizing compound
- a heat-sensitive layer on said support comprising a heat-activatable generator of an alkaline material, said generator being a compound consisting of the group of beta-aminodicarboxylic acids, and metal monosalts of such acids, said acids having the general formula wherein R is hydroxy, alkyl or alkenyl having 1 to 8 carbon atoms, cyclohexyl, phenyl alkyl, alkoxy phenyl alkyl or phenaeyl, R is H, alkyl or alkenyl having 1 to 4 carbon atoms, R is H, alkyl or alkenyl having 1 to 4 carbon atoms, cyclohexyl or benzyl, or R and R form a hydrogenated 5- or 6-membered N-heterocyclic ring; and (d) an azo dye coupler capable of forming a dye with said diazonium compound in an alkaline medium, said coupler being in one of said light-sensitive or heat-sensitive layers.
- said lightsensitive layer comprises an outermost layer on at least one side of said support.
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK0058769 | 1966-03-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3520691A true US3520691A (en) | 1970-07-14 |
Family
ID=7228831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US623340A Expired - Lifetime US3520691A (en) | 1966-03-19 | 1967-03-15 | Heat-developable diazotype material |
Country Status (9)
Country | Link |
---|---|
US (1) | US3520691A (en) |
AT (1) | AT274570B (en) |
BE (1) | BE695611A (en) |
CH (1) | CH453071A (en) |
DE (1) | DE1572072C3 (en) |
ES (1) | ES338180A1 (en) |
GB (1) | GB1172935A (en) |
NL (1) | NL152668B (en) |
SE (1) | SE326890B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767394A (en) * | 1971-02-02 | 1973-10-23 | Minnesota Mining & Mfg | Color copying and sheet material therefor |
US3976488A (en) * | 1969-02-19 | 1976-08-24 | Mita Industrial Company, Ltd. | Treating agent for diazo-type multicolor reproduction |
US4168171A (en) * | 1977-08-05 | 1979-09-18 | Minnesota Mining And Manufacturing Company | Light-sensitive thermal developable diazotype sheets with imidazoles |
US4230789A (en) * | 1978-03-13 | 1980-10-28 | Minnesota Mining And Manufacturing Company | Thermal diazotype sheets |
US4252891A (en) * | 1977-07-29 | 1981-02-24 | Kostyshin Maxim T | Method of manufacturing embossed articles of preset configuration |
US4283477A (en) * | 1978-11-02 | 1981-08-11 | Eastman Kodak Company | Photothermographic material and process |
US4467024A (en) * | 1981-12-08 | 1984-08-21 | Ricoh Co., Ltd. | Process for the production of thermo-developable type diazo copying material |
US20030202255A1 (en) * | 2002-01-16 | 2003-10-30 | Nader Pakdaman | Bi-convex solid immersion lens |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2069304A1 (en) * | 1989-10-13 | 1991-04-14 | Malcolm D. Engel | Ion flotation with anionic reagents |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3046128A (en) * | 1958-07-03 | 1962-07-24 | Dietzgen Co Eugene | Thermally developable diazotype photoprinting material and production thereof |
GB907724A (en) * | 1960-02-01 | 1962-10-10 | Dietzgen Co Eugene | Diazotype reproduction material and method of using the same |
US3076707A (en) * | 1959-04-22 | 1963-02-05 | Nashua Corp | Heat developable copy sheet and compositions useful therefor |
NL6404649A (en) * | 1963-04-27 | 1964-10-28 | ||
US3199982A (en) * | 1963-03-19 | 1965-08-10 | Keuffel & Esser Co | Diazotype reproduction material |
FR1418156A (en) * | 1964-10-05 | 1965-11-19 | Bauchet & Cie Ets | Thermodevelopable diazotype product |
US3284201A (en) * | 1961-12-21 | 1966-11-08 | Grinten Chem L V D | Three layered light-sensitive diazotype material |
US3416924A (en) * | 1964-03-10 | 1968-12-17 | Oce Van Der Grinten Nv | Heat-developable diazotype material |
US3434838A (en) * | 1964-02-29 | 1969-03-25 | Keuffel & Esser Co | Heat-developable reproduction material |
-
1966
- 1966-03-19 DE DE1572072A patent/DE1572072C3/en not_active Expired
-
1967
- 1967-02-28 NL NL676703264A patent/NL152668B/en unknown
- 1967-03-15 US US623340A patent/US3520691A/en not_active Expired - Lifetime
- 1967-03-16 CH CH386067A patent/CH453071A/en unknown
- 1967-03-16 BE BE695611D patent/BE695611A/xx unknown
- 1967-03-16 AT AT256667A patent/AT274570B/en active
- 1967-03-17 ES ES338180A patent/ES338180A1/en not_active Expired
- 1967-03-17 SE SE03778/67A patent/SE326890B/xx unknown
- 1967-03-17 GB GB02724/67A patent/GB1172935A/en not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3046128A (en) * | 1958-07-03 | 1962-07-24 | Dietzgen Co Eugene | Thermally developable diazotype photoprinting material and production thereof |
US3076707A (en) * | 1959-04-22 | 1963-02-05 | Nashua Corp | Heat developable copy sheet and compositions useful therefor |
GB907724A (en) * | 1960-02-01 | 1962-10-10 | Dietzgen Co Eugene | Diazotype reproduction material and method of using the same |
US3284201A (en) * | 1961-12-21 | 1966-11-08 | Grinten Chem L V D | Three layered light-sensitive diazotype material |
US3199982A (en) * | 1963-03-19 | 1965-08-10 | Keuffel & Esser Co | Diazotype reproduction material |
NL6404649A (en) * | 1963-04-27 | 1964-10-28 | ||
US3434838A (en) * | 1964-02-29 | 1969-03-25 | Keuffel & Esser Co | Heat-developable reproduction material |
US3416924A (en) * | 1964-03-10 | 1968-12-17 | Oce Van Der Grinten Nv | Heat-developable diazotype material |
FR1418156A (en) * | 1964-10-05 | 1965-11-19 | Bauchet & Cie Ets | Thermodevelopable diazotype product |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3976488A (en) * | 1969-02-19 | 1976-08-24 | Mita Industrial Company, Ltd. | Treating agent for diazo-type multicolor reproduction |
US3767394A (en) * | 1971-02-02 | 1973-10-23 | Minnesota Mining & Mfg | Color copying and sheet material therefor |
US4252891A (en) * | 1977-07-29 | 1981-02-24 | Kostyshin Maxim T | Method of manufacturing embossed articles of preset configuration |
US4168171A (en) * | 1977-08-05 | 1979-09-18 | Minnesota Mining And Manufacturing Company | Light-sensitive thermal developable diazotype sheets with imidazoles |
US4230789A (en) * | 1978-03-13 | 1980-10-28 | Minnesota Mining And Manufacturing Company | Thermal diazotype sheets |
US4283477A (en) * | 1978-11-02 | 1981-08-11 | Eastman Kodak Company | Photothermographic material and process |
US4467024A (en) * | 1981-12-08 | 1984-08-21 | Ricoh Co., Ltd. | Process for the production of thermo-developable type diazo copying material |
US20030202255A1 (en) * | 2002-01-16 | 2003-10-30 | Nader Pakdaman | Bi-convex solid immersion lens |
Also Published As
Publication number | Publication date |
---|---|
DE1572072B2 (en) | 1973-06-28 |
CH453071A (en) | 1968-05-31 |
GB1172935A (en) | 1969-12-03 |
NL6703264A (en) | 1967-09-20 |
ES338180A1 (en) | 1968-06-16 |
BE695611A (en) | 1967-09-18 |
NL152668B (en) | 1977-03-15 |
DE1572072C3 (en) | 1974-02-28 |
DE1572072A1 (en) | 1970-02-26 |
SE326890B (en) | 1970-08-03 |
AT274570B (en) | 1969-09-25 |
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