Abstract: An aqueous diazo coating composition is disclosed to be used in accordance with an alkaline vapor development system, containing a hydrolyzed resin together with a diazo light-sensitive compound, coupling agent and stabilizing materials. The aqueous diazo coating composition of the present invention provides a method of fabricating a light-sensitive diazo member for use in combination with a development system utilizing alkaline vapors which excludes the use of organic solvents.

Abstract: Photoresist compositions based upon a water-soluble polymer are disclosed together with a water-soluble bisazide compound as a cross-linker, a water-soluble adhesion-improving diazo compound are characterized in that a water-soluble silane compound is included. The compositions are photosensitive, particularly to ultraviolet rays, and adhere well to the substrates to which they are applied. The compositions of the invention are used as photoresists.

Abstract: A diazotype heat development recording medium of the present invention has excellent shelf life and heat sensitivity. The medium comprises a support and a recording layer which is formed on said support and which comprises a diazo compound, a coupler, an acid stabilizer, a thermal developer, and a polymeric binder. The thermal developer is a salt of an organic or inorganic acid having a primary dissociation constant of 2.times.10.sup.-1 to 1.times.10.sup.-4 and an alkyl-substituted guanidine represented by the general formula: ##STR1## (wherein at least one of R1 and R2 is an alkyl group of C.sub.8 to C.sub.24, and the other of R1 and R2 is a hydrogen atom or an alkyl group of C.sub.1 or more).

Abstract: This invention relates to an improvement in a photochemical process for the preparation of printing plates wherein a printing plate comprising a photosensitive composition coated on a support is exposed to a pattern of laser light, the intensity of which is modulated in accordance with an input source of information and said printing plate is subsequently developed by removal from said support of that portion of the photosensitive coating composition which is not exposed to said pattern of laser light, the improvement comprising utilizing a pattern of laser light generated by a laser at a wavelength greater than about 450 nm, and utilizing as a photosensitive composition a negative-working condensate of a para-aminobenzene diazonium compound, said compound being present in a quality of at least 25% of the total coating weight.

Abstract: A non-silver, positive-working, essentially alkali-insoluble, radiation-sensitive composition, which becomes alkali-soluble on exposure to radiation, comprising a non-silver, positive-acting, essentially alkali-insoluble radiation-sensitive component a radiation absorbing component and an essentially alkali-soluble polymeric binder. A radiation-sensitive element comprising a transparent substrate overcoated with said radiation-sensitive composition. A duplicating film comprising the said element prepared by exposing said composition through the substrate and then image-wise exposing said composition through a mask in front of the composition followed by treatment with an alkaline developer to remove those areas of the composition subjected to both exposures.

Abstract: A process for the production of a thermo-developable type diazo copying material which comprises the steps of adding a heat fusible color assistant having a melting point of 50.degree. to 150.degree. C. to at least one selected from the group consisting of (a) an aqueous dispersion A containing a diazonium salt and fine particles of a hydrophobic resin consisting of a polymer of vinyl chloride, vinylidene chloride, styrene, acrylic ester, mechacrylic ester or olefin or a copolymer containing at least one member of aforesaid monomers as the constitution unit or a mixture of said polymer with said copolymer and (b) an aqueous solution or dispersion B containing coupler; then applying these aqueous dispersion A and aqueous solution or dispersion B onto a substrate in the order named; and drying same.

Abstract: The invention concerns a heat, steam or water developing diazotype material, containing a photosensitive diazonium salt stabilized with a non-diffusing acid and also one or several developing coats--which could contain the coupling agent--located on the front or back side of the used base material, products avoiding the interpenetration of the active agents, preventing the washing of one coat through the another during coating process, slowing down the absorption of ambient humidity at normal temperature, absorbing the volatile alkaline products at normal temperature, separating the essential reagents to avoid their spontaneous reaction, releasing an accelerating plasticizer during the development, reducing the activation temperature, improving the development by formation of an insoluble salt with the stabilizing acid, releasing a non-volatile weak acid in case of an attack by moisture.

Abstract: This invention relates to proof film-type light sensitive diazonium materials containing accelerators selected from sulfur and/or amide-containing compounds which are capable of accelerating the contact exposure of negative-working diazonium compounds when such diazonium compounds are subjected to UV radiation. These accelerators enhance essentially photosensitivity speed. The invention also relates to presensitized reproduction materials comprising diazonium materials containing these accelerators.

Abstract: An amphoteric surfactant is added to a photosensitive composition consisting essentially of an aromatic diazonium salt and used to prepare a fluorescent screen of a color picture tube.

Abstract: Caprolactam, caprylolactam, and azacyclooctanone have been found to be equally effective as thiourea in stabilizing diazotype compositions and materials against pre-coupling, loss of shelf life, and dye image fading.

Abstract: This invention relates to a one- or two-component diazo-type material with improved light stability and duplication capabilities. This is accomplished by using compounds of the general formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 being the same or different, represent hydrogen, alkyl with 1 to 5 carbon atoms, R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4 represent the alkyl groups necessary for completion of a 5- or 6-membered heterocyclic ring, wherein the ring may comprise a further hetero atom, such as N, O or S;R.sub.5, R.sub.6 being the same or different, represent hydrogen, aryl, alkyl with 1 to 4 carbon atoms;Y represents --S--, --SO--, --SO.sub.2 --; andn is 0, 1, 2, 3,which are added to the material as fading inhibitors. These compounds can be easily synthesized and are compatible with the system, having an absorption maximum below 380 nm and reduced fogging tendency. They may also be employed in the form of their hydro salts.

Abstract: A diazo type thermosensitive recording material comprising a support material and a thermosensitive recording layer formed thereon, wherein the thermosensitive recording layer comprises a diazo compound, a coupler, a thermo-fusible or thermo-softening binder agent and a thermo-fusible material. The weight ratio of the diazo compound and the thermo-fusible material is in the range of 1:2 to 1:30, and both the diazo compound and the coupler exist as separate particles in the thermosensitive recording layer.

Abstract: Novel adducts of phthalaldehyde are disclosed, as well as imaging compositions and imaging elements incorporating them. A method is also disclosed for minimizing dimensional changes in the element during processing.

Abstract: Disclosure is made of a class of diazonium salts characterized in part by their improved thermal stability and non-flammability. The salts are useful in diazotypy.

Abstract: Disclosure is made of a light-sensitive diazo coating composition and a light-sensitive diazotype reproduction material comprising a base with at least one coating layer comprising a light sensitive diazo compound, coupling component, a stabilizing acid and salt, and a development accelerating and stabilizing composition of 1,3-dimethylurea with urea or with thiourea, which also improves sensitizing solution compatibility and increases printing speed.

Abstract: A thermo-developable type diazo copying material is disclosed comprising a substrate and a photosensitive layer, formed thereon, consisting essentially of a diazo compound, a coupler and a color assistant, wherein said color assistant is at least a member selected from the group consisting of fatty acid amides having the general formula I:R.sup.1 CONH.sub.2(wherein, R.sup.1 is a saturated or unsaturated aliphatic hydrocarbon group having 5 to 24 carbon atoms), N-substituted fatty acid amides having the general formula II:R.sup.1 CONHR.sup.2(wherein, R.sup.1 is the same as defined above and R.sup.2 is an alkyl group having 1 to 5 carbon atoms, substituted or non-substituted phenyl group or substituted or non-substituted cyclohexyl group) and N-substituted fatty acid amides having the general formula III:R.sup.1 NHCOR.sup.2(wherein, R.sup.1 and R.sup.

Abstract: A novel light sensitive, heat developable imaging system incorporating a diazonium salt and a leuco dye in a binder is disclosed.

Abstract: A fixable thermosensitive recording sheet with excellent shelf life and high developed color density is obtained by using a hydrophobic guanidine derivative as heat-fusible developer in a thermosensitive recording sheet consisting of a substrate, a photo- and thermo-sensitive layer made from a diazonium salt and formed on said substrate, and a developer layer overlying said photo- and thermo-sensitive layer and made from a heat-fusible developer, with a coupler compound contained in at least one of said two layers.

Abstract: A photosensitive composition improved in sensitivity by adding a salt of a compound represented by the general formula: ##STR1## (wherein R.sub.1 and R.sub.2 each represents a straight chain alkyl group, and X, Y and Z each represents H, a straight chain alkyl group or an alkoxy group, but two or more of X, Y and Z can not be H at the same time) to an aromatic diazonium salt which gets sticky upon exposure to light.

Abstract: An imageable layer comprising a polymeric binder, a bleachable dye or a leuco dye, a nitrate salt, and a photosensitive diazonium salt, the nitrate salt in the imageable layer being capable of liberating HNO.sub.3, NO, NO.sub.2 or N.sub.2 O.sub.4 in oxidizing amounts when the layer is heated to no more than 200.degree. C. for 60 seconds.

Abstract: There are disclosed an imaging composition, element and method featuring an aromatic dialdehyde that reacts with an exposure-generated amine to form a dye. The photographic speed of the reaction is improved by incorporating into the composition an imide capable of providing an ##STR1## moiety when heated.

Abstract: Negative-working diazography material is comprised of (i) at least one hexafluorophosphate diazonium salt adapted to photolytically cleave into an acid catalyst, (ii) at least one acid labile enolic, preferably arylenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, and (iii) an effective amount of at least one additive such as benzotriazole, urea, thiourea and derivatives thereof. The additives are believed to react with the acid released during imaging to the extent that migration thereof into the areas which have not been exposed to light is reduced or eliminated. The reduction in the migration of the liberated acid improves the D-min and line acuity of the image obtained from the formulation and the presence of the additive provides a means for decreasing the photo speed of the formulation.

Abstract: Negative-working diazography formulation is comprised of (i) at least one hexafluorophosphate diazonium salt adapted to photolytically cleave into an acid catalyst, (ii) at least one acid labile enolic, preferably arylenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, and (iii) an effective amount of an additive, such as p-toluenesulfonyl benzamide, capable of controlling the pH of films prepared from said formulation when subjected to a clearing step as defined herein.

Abstract: A photo-sensitive and heat-sensitive composition consisting essentially of a leuco-pigment; a hydrogen donator; a photo-reductant which, when exposed to a visible light, produces a reducing agent by the action of said hydrogen donator coexisting therewith; a photooxidant which, when exposed to an ultraviolet ray, causes said leuco-pigment coexisting therewith to generate color and simultaneously, when reacted with said reducing agent, is deprived of its own oxidizing ability; and a cobalt complex which reacts with the reducing agent in amplifying manner to thereby suppress the reaction of a color-forming system, and a recording element using the same.

Abstract: A process for making a diazo photosensitive paper which comprises adding a specified ultraviolet absorber to a photosensitive layer consisting of a diazonium salt and a coupler, adding the ultraviolet absorber to ethyl acetate to prepare a solution, dispersing said solution in an aqueous solution containing specified amounts of sulfosuccinate and polyvinyl alcohol, evaporating the ethyl acetate contained therein, mixing the thus-prepared liquid with a photosensitive liquid in a specified amount, and applying the photosensitive liquid containing the ultraviolet absorber to a paper substrate.

Abstract: A positive working light-sensitive composition comprises in admixture (a) a first component which is an azo dye formed by reacting a p-amino-benzene diazonium salt and a compound including the grouping ##STR1## and (b) a second component which includes a o-quinone diazide and/or a diazonium compound and which, on exposure to light produces an acidic light decomposition product which is capable of reacting with the azo dye to produce a material having a color different to that of the azo dye. The composition exhibits a color change on exposure to light and is useful for the manufacture of light sensitive plates for use in lithographic printing plate production.

Abstract: Negative-working diazography material is comprised of (i) at least one diazonium compound, (ii) at least one acid labile enolic, preferably phenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, (iii) at least one light-sensitive acid progenitor, and (iv) at least one carboxylic acid anhydride. The diazonium compound can itself concurrently function as the acid progenitor, e.g., when complexed with a Lewis acid. Upon imagewise exposure to light, acid catalyst is photochemically liberated, thus unblocking coupler molecules such that dye image forms under alkaline developing conditions only where the material has been irradiated. Under alkaline developing conditions, the anhydride reacts to render the unused diazo component remaining in the unexposed areas inactive.

Abstract: There is disclosed a composition and element, comprising a diazo resin and a mordant for anionic dyes that is compatible with the resin. The element of the invention is suitable for dye immersion and dye transfer to a mordanted receiver.

Abstract: An image-forming element is disclosed comprised of a support and a coating thereon containing a cobalt(III)complex and a compound containing a conjugated .pi. bonding system capable of forming at least a bidentate chelate with cobalt(III). The coating is predominantly free of anions which will form conjugate acids by deprotonation of a cobalt(II)complex containing the chelating compound. In one preferred form the image-forming element is radiation-sensitive. In this form the image-forming element can contain a photoactivator capable of initiating reduction of the cobalt(III)complex. An imaging process is disclosed in which the coating is exposed to actinic radiation to produce an image. Images can be recorded directly within the image-forming coating or in a separate image-recording element or layer by use of the residual cobalt(III)complex or by use of one or more of the reaction products produced by exposure.

Abstract: Photosensitive compositions containing 2-halomethyl-5-vinyl-1,3,4-oxadiazole compounds represented by the following general formula (I): ##STR1## wherein W represents a substituted or unsubstituted aryl group, X represents a hydrogen atom, an alkyl group or an aryl group, Y represents a fluorine atom, a chlorine atom or a bromine atom, and n represents an integer of 1 to 3.

Abstract: There is disclosed a composition and element, comprising a diazo resin and a mordant for anionic dyes that is compatible with the resin. The element of the invention is suitable for dye immersion and dye transfer to a mordanted receiver.