Abstract: Positive photoresist layers including a base soluble resin and a diazo ketone sensitizer are treated with hydrogen ion following initial exposure to achieve changes in the developed resist profile and/or development in a negative mode.

Abstract: Recording media comprising a mixture of 4,4'-bis(3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonyloxy)benzil and an alkali soluble resin are suitable for recording information with electron beams. These recording media have high sensitivity, high resolving power and can be reproducibly formulated.

Abstract: A photosensitive color-forming element comprises a support and a photosensitive color-forming layer carried on the support and containing therein a color-forming coupler, for example, 1-naphthol, 2-naphthol and 2,4-dichloro-1-naphthol, and a photosensitive azido compound of the formula (I) or (II): ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl, alkoxyl, diethylamino or hydroxyl radical R.sub. 2 an alkyl, alkoxyl or hydroxyl radical, and R.sub.3 a hydrogen atom or an alkyl or phenyl radical, and, if necessary, a polymeric material capable of hardening or being insolubilized in solvent when the polymeric material is exposed to radiation rays in the presence of the above azido compound, the above-mentioned azido compound and color-forming coupler being capable of forming a dark color upon exposure to radiation rays, without a color-developing agent.

Abstract: Light-sensitive article comprising a substrate coated with a light-sensitive composition comprising a diazonium salt formed from an aromatic diaxonium compound and an adhesive acid or salt thereof. The article can be utilized as a driographic printing plate upon imagewise exposure to actinic radiation without necessity of a liquid development step.

Abstract: Copolymers of glycidyl acrylate and allyl glycidyl ether and terpolymers derived from addition of glycidyl methacrylate to the polymerizable mixture, having an inherent viscosity within the range of about 0.09 to 0.28 and an epoxy equivalent of at least about 0.64 per 100 g. of polymer are provided which upon admixture with a catalyst which is a radiation-sensitive aryldiazonium salt of a complex halogenide, provides compositions suitable for use in a dry photopolymer positive imaging process. In the process, the polymer which is non-tacky at room temperature, together with the catalyst is applied to a substrate and exposed to an energy source for example, electromagnetic radiation through a transparency or mask. Following exposure, the coating is heated to the softening point of the unexposed portion of the coating and a powder or toner is applied thereto, the toner being adhered to only the tacky, non-exposed area of the coating, resulting in a pigmented image.

Abstract: Antistatic polyester films suitable for montage printing processes are made by coating the polyester film during or after orientation with an antistatic composition comprising lithium nitrate and polymeric binder, such as an acrylic copolymer.

Abstract: Plastic pigment spheric particles which form a matrix for diazotype reproduction materials are applied to a base sheet. Whether the diazo sensitizing solution is included in admixture with spheric plastic pigment particles or is applied thereafter as a second coating, a matrix is formed having a sensitized diazo layer dispersed throughout. Such diazo matrices permit control of contrast ratios over a wide range. Also such diazo matrices are transferable. The diazo matrix image can be made water fast by an after treatment by means of a solvent. Such a matrix lends itself to the heat development process by retaining the heat generated development agents within the matrix due to its thermoplastic character. In another aspect of the invention multi-color diazo reproduction on a single base sheet employing consecutive overcoatings of the matrix and diazo sensitizing solution after each development can be achieved.

Abstract: Light-sensitive compositions including a polymer of the type that is reactable with an azide sensitizer when exposed to light and a sensitizing amount of a naphthalene sensitizer having ortho diazo and oxo substituents at the 1,2 or the 2,1 positions of the naphthalene nucleus and further having an azidosulfonyl substituent group of which the sulfonyl moiety is bonded directly to the naphthalene nucleus at the 4 or the 5-position, are advantageous in the preparation of positive-working photolithographic materials. IN the azidosulfonyl group, the azido moiety can be linked directly or indirectly to the sulfonyl moiety, such as in the compounds 2-diazo-1,2-dihydro-1-oxo-5(4'-azidophenoxysulfonyl)naphthalene and 5-azidosulfonyl-2-diazo-1,2-dihydro-1-oxonaphthalene. The light-sensitive compositions can be coated on support materials to prepare composite photographic elements having utility as photolithographic printing masters and photoresists for etching operations.

Abstract: An improved process for the diazo-type multicolor reproduction which can give multicolored copies excellent in the hue separation and can increase the number of copies obtained from an original treated with a color-forming agent is disclosed. This improved multicolor reproduction process is characterized by the use of a color-forming composition comprising a thermo-volatile or sublimable coupler and at least one hue separation-improving agent selected from polyalkylene oxides and polyalkylene oxide derivatives which are solid under normal conditions and fatty acid derivatives having a melting point of at least 100.degree.C.

Abstract: Images are recorded on ultraviolet-light sensitive recording materials employing photographic intermediates which function optically to reflect visible light and transmit ultraviolet light. To give the intermediates the desired optical function, a polyolefin compounded with certain white pigments is included as a sublayer between the paper support sheet and photosensitive layer.

Abstract: An original-treating agent to be used in the process for the diazo-type multi-color reproduction by which portions of a sensitive paper corresponding to preselected portions of an original can be colored selectively in different hues.

Abstract: A light-sensitive diazotype material comprising a base support having a coating thereon which comprises a light-sensitive diazonium compound and a coupling component having the general formula ##SPC1##Wherein R is hydrogen, a lower alkyl radical, halogen or aryl, and R' is hydrogen or SO.sub.3 M wherein M is a monovalent cation.

Abstract: A diazotype material is disclosed containing a novel 2-substituent-3-thio-5-alkoxybenzene diazonium compound of formula I ##SPC1##whereinX is an anion,A is the group ##EQU1## or -- OR.sub.4 in whichR.sub.1 is hydrogen, an alkyl radical with 1-8 carbon atoms, a substituted phenyl, cycloalkyl, or aralkyl radical or a heterocyclic radical,R.sub.2 is an alkyl radical with 1-8 carbon atoms, a --COOR.sub.5 group in whichR.sub.5 signifies hydrogen, an alkyl radical with 1-8 carbon atoms, a cycloalkyl, aryl, aralkyl, or alkylaryl radical or a heterocyclic radical, or a group of ##EQU2## in which R.sub.6 and R.sub.7 stand independently of one another for hydrogen or a hydroxy, alkoxy, alkyl with 1-4 carbon atoms, or phenyl radical,R.sub.1 and R.sub.2 together with the nitrogen may be a morpholino, a methyl-substituted morpholino, pyrrolidino, or piperidino group,R.sub.3 is an alkyl radical with 1-8 carbon atoms, an aralkyl, alkoxyaryl, haloaryl, alkoxyalkyl, or cycloalkyl radical or a heterocyclic radical, andR.sub.

Abstract: This invention relates to an improvement in a light-sensitive copying layer containing an ester or an amide of an o-naphthoquinone diazide sulfonic acid or carboxylic acid together with an organic dyestuff and which changes its color shade upon exposure to light, the improvement comprising that it contains, calculated on its total content of o-naphthoquinone diazide compounds, 10 to 75 per cent by weight of a halide of o-naphthoquinone diazide-4-sulfonic acid and, as the dyestuff, an organic compound capable of salt formation in a quantity of 1 to 50 per cent by weight, calculated on the same basis.

Abstract: Stable diazonium catalyst solutions are provided in which the catalyst is dissolved in an organic sulfone. The catalyst solutions have greatly extended shelf-life while at the same time retain the ability to rapidly cure epoxy resins upon exposure to an energy source.Polymerizable compositions of the two-package type, comprising polymerizable epoxy materials and such catalyst solutions are also provided.

Abstract: A lithographic printing plate structure and method of manufacture, in which a support sheet of steel, normally subject to corrosion in a lithographic environment, such as a mild steel, is coated, preferably on both sides, with aluminum, zinc or an aluminum-zinc alloy to a thickness of about 1 to 3 mils, a polyvinyl phosphonic acid is disposed on the metal coating and a negative working diazo photo-sensitive layer is applied over the polyvinyl phosphonic acid coating.

Abstract: A presensitized lithoprinting plate which needs no fountain solution on printing comprising a support and a coating layer of a mixture of a photosensitive material and a silicone rubber.

Abstract: Recording media comprising a mixture of 2,4-bis(6-diazo-5,6-dihydro-5-oxo-1-napthalenesulfonyloxy)-benzophenone and an alkaki soluble resin are suitable for recording information with electron beams. These recording media have high sensitivity, high resolving power and can be reproducibly formulated.

Abstract: A new dry planographic plate having a non-ink receptive silicone rubber background area that does not require a fountain solution to repel printing ink and process of producing this new plate comprising applying the photoresponsive sensitizer to a polymeric support film and bringing the sensitizer layer into intimate adhesive contact with an uncured silicone gum and thereafter curing the silicone gum.

Abstract: A dry presensitized planographic plate composed of a support having coated thereon one or two layers of (a) a silicone rubber, (b) a photosensitive azide compound, (c) a cyclized rubber, and (d) a copolymer of vinylidene chloride and acrylonitrile, the uppermost layer, when the planographic plate has two layers, containing at least the component (a) and (b) and the lower layer containing at least the component (c).

Abstract: Dry photoimaging processes and compositions employing photosensitive coatings of volatile peri-substituted aromatic azido compounds in a permeable film-forming plastic are disclosed.

Abstract: A presensitized planographic printing plate which can be used in both negative and positive work comprising a support, a layer formed on the support of a photosensitive substance prepared by the reaction at a pH of not more than 7.5 of a diazonium compound with a coupling agent, e.g., hydroxybenzophenone, and a layer formed on the photosensitive layer of a "one-package" silicone rubber curable at room temperature. A planographic printing plate per se is produced by imagewise exposing the presensitized plate through a negative or positive film, and treating the exposed plate with a treating liquid capable of removing those portions of the presensitized plate which correspond to the image area of the original. Dampening water is not required when printing is carried out using the resulting printing plate.

Abstract: An aqueous developable subtractive printing plate is presented comprising a photosensitized hydrophilic surface having a photosensitive diazo-borofluoride salt thereon.A method for making a photosensitized printing plate is also presented wherein a photosensitive diazo-borofluoride salt is coated on the plate.

Abstract: A light-sensitive material comprising a support carrying a coating of a phopolymerisable epoxy resin composition containing, as a photo-sensitive compound capable of catalyzing hardening of the epoxy resin, a diazonium salt soluble in organic solvents and whereof the cation is devoid of basic groups and the anion is selected from the following: difluorophosphate, phosphotungstate, phosphomolybdate, tungstogermanate, silicotungstate and molybdosilicate.