Abstract: The present invention provides an imageable composition including an acid curable composition, an acid generator, an infrared absorber having a counter anion derived from a non-volatile acid, and a strong acid such as a sulfonic acid. The imageable composition may include components such as a crosslinkable binder or a colorant. In one embodiment, the imageable composition further includes a colorant having a counter anion derived from a non-volatile acid. The present invention further provides an imageable element, which includes a substrate and an imageable coating on a surface of the substrate. Also provided is method of producing an imaged element according to the invention.

Abstract: A positive-working lithographic printing plate is used to provide a positive image without a post-exposure baking step and without any floodwise exposure steps. The printing plate includes a layer that is imageable using an infrared radiation laser. This layer consists essentially of a phenolic resin, an infrared radiation absorbing compound, and a dissolution inhibitor that is non-photosensitive and is capable of providing sites for hydrogen bonding with the phenolic moieties of the binder resin.

Abstract: A positive-working lithographic printing plate is used to provide a positive image without a post-exposure baking step and without any floodwise exposure steps. The printing plate includes a layer that is imageable using an infrared radiation laser. This layer consists essentially of a phenolic resin, an infrared radiation absorbing compound, and a dissolution inhibitor that is non-photosensitive and is capable of providing sites for hydrogen bonding with the phenolic moieties of the binder resin. These printing plates are developed with an alkaline composition that includes an alkali metal silicate, a thickener and a fluorosurfactant or phosphate ester hydrotrope.

Abstract: A positive-working lithographic printing plate is used to provide a positive image without a post-exposure baking step and without any floodwise exposure steps. The printing plate includes an imaging layer that is imageable using an infrared radiation laser. The imaging layer consists essentially of a phenolic resin and an infrared radiation absorbing compound.

Abstract: A lithographic printing plate that has an imaging layer that comprises an admixture of (1) a resole resin, (2) a novolac resin, (3) a latent Bronsted acid and (4) an infrared absorber; that is sensitive to both ultraviolet and infrared radiation; and that is capable of functioning in either a positive-working or negative-working manner is imagewise exposed with a laser diode that emits a high-intensity infrared laser beam which provides enhanced image sharpness.

Abstract: A radiation-sensitive composition especially adapted to prepare a lithographic printing plate that is sensitive to both ultraviolet and infrared radiation and capable of functioning in either a positive-working or negative-working manner is comprised of (1) a resole resin, (2) a novolac resin, (3) a latent Bronsted acid, (4) an infrared absorber, and (5) terephthalaldehyde. The solubility of the composition in aqueous alkaline developing solution is both reduced in exposed areas and increased in unexposed areas by the steps of imagewise exposure to activating radiation and heating.

Abstract: Electrophotographic elements including near-infrared radiation absorbing sensitizers and selected near-infrared radiation absorbing additives exhibit a reduced tendency toward the formation of laser interference patterns. These elements can be utilized in electrophotographic imaging processes including the steps of electrostatically charging the element, imagewise exposing the charged element to near-infrared radiation to form an electrostatic latent image, developing the electrostatic latent image by applying charged toner particles to the element to produce a toned image, and transferring the toned image to a suitable receiver.

Abstract: A radiation-sensitive composition especially adapted to prepare a lithographic printing plate that is sensitive to both ultraviolet and infrared radiation and capable of functioning in either a positive-working or negative-working manner is comprised of (1) a resole resin, (2) a novolac resin, (3) a latent Bronsted acid and (4) an infrared absorber. The solubility of the composition in aqueous alkaline developing solution is both reduced in exposed areas and increased in unexposed areas by the steps of imagewise exposure to activating radiation and heating.

Abstract: A radiation-sensitive composition especially adapted to prepare a lithographic printing plate that is sensitive to both ultraviolet and infrared radiation and capable of functioning in either a positive-working or negative-working manner is comprised of (1) a resole resin, (2) a novolac resin, (3) a latent Bronsted acid and (4) an infrared absorber. The solubility of the composition in aqueous alkaline developing solution is both reduced in exposed areas and increased in unexposed areas by the steps of imagewise exposure to activating radiation and heating.

Abstract: A radiation-sensitive composition especially adapted to prepare a lithographic printing plate that is sensitive to both ultraviolet and infrared radiation and capable of functioning in either a positive-working or negative-working manner is comprised of (1) a resole resin, (2) a novolac resin, (3) a latent Bronsted acid and (4) an infrared absorber. The solubility of the composition in aqueous alkaline developing solution is both reduced in exposed areas and increased in unexposed areas by the steps of imagewise exposure to activating radiation and heating.

Abstract: The effects of acne and psoriasis are relived by applying either topically or by oral adminstration, a compound having the structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are independently selected from the group consisting of H, Cl, straight or branched alkyl of 1 to 10 carbon atoms, NO.sub.2, COOR.sub.6, CN, OR.sub.6, NR.sub.6 R.sub.7, NR.sub.6 C(.dbd.S)NR.sub.7 R.sub.8, NF.sub.6 COR.sub.7, SO.sub.2 NR.sub.6 R.sub.7, CH(CH.sub.3)COOH, CONR.sub.6 R.sub.7, COR.sub.6, OCONR.sub.6 R.sub.7, NR.sub.6 COONR.sub.7, R.sub.9 OR.sub.6, NR.sub.6 SO.sub.2 R.sub.7, Si(CH.sub.3).sub.3, and NR.sub.6 CONR.sub.7 R.sub.8,R.sub.3 together with R.sub.4 forms a benzo ring or taken together with R.sub.2 forms a benzo or tetrahydrobenzo ring or together with R.sub.2 and R.sub.1 forms a: ##STR2## moiety or together with R.sub.2 forms a ##STR3## moiety or R.sub.2 together with R.sub.1 forms a benzo ring or R.sub.2 together with R.sub.3 forms a ##STR4## moiety, or R.sub.

Abstract: A dye mixture comprising at least two different unsymmetrical bis[1,2-diphenyl-1,2-ethanedithiolato(2.sup.-)-S,S'] -platinum compounds is disclosed. The mixture is useful in optical recording layers.

Abstract: A negative working photoresist is disclosed responsive to imaging radiation of a visible wavelength shorter longer than 550 nm comprised of an organic film forming component containing ethylenic unsaturation and capable of selective immobilization by addition at the site of ethylenic unsaturation and activator and photosensitizer coinitiators for ethylenic addition. The activator is an azinium salt activator, and the photosensitizer is a dye having its principal absorption peak at a wavelength shorter than 550 nm and having a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive. When the dye is a keto dye, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent.

Abstract: An imaging composition is disclosed comprised of an organic component containing ethylenic unsaturation sites and capable of selective hardening by addition at the sites of ethylenic unsaturation, an azinium salt activator, a photosensitizer having a reduction potential which in relation to the reduction potential of the azinium salt activator is at most 0.1 volt more positive, and an image enhancing amount of benzene substituted with an electron donating amino group and one or more groups capable of imparting a net Hammett sigma value electron withdrawing characteristic of at least +0.20 volt to said benzene ring.

Abstract: A photographic imaging system is disclosed comprised of an imaging dye or a precursor thereof, a hardenable organic component containing ethylenic unsaturation sites and capable of imagewise modulating mobility of the dye or dye precursor as a function of addition at the sites of ethylenic unsaturation, and coinitiators for ethylenic addition. The coinitiators include an azinium salt activator and a photosensitizer which is a dye exhibiting a reduction potential which in relation to that of said ionized azinium salt activator is at most 0.1 volt more positive, with the further proviso that, when the photosensitizer is a keto dye having its principal absorption peak at a wavelength shorter than 550 nm, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent.

Abstract: A negative working photoresist is disclosed responsive to imaging radiation of a wavelength longer than 550 nm comprised of an organic film forming component containing ethylenic unsaturation and capable of selective immobilization by addition at the site of ethylenic unsaturation and activator and photosensitizer coinitiators for ethylenic addition. The activator is an azinium salt activator, and the photosensitizer is a dye having its principal absorption peak at a wavelength longer than 550 nm and having a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive.

Abstract: Compositions comprising a polymer and dendrite crystals of a salt consisting of the cation of 2-(4,5-dihydronaphtho[1,2-d]-1,3-dithiole-2-ylidene)-4,5-dihydronaphtho [1,2-d]-1,3-dithiole and an anion are useful in forming conductive coatings.

Abstract: Compositions comprising a polymer and dendrite crystals of a salt consisting of the cation of 2-(4,5-dihydronaphtho[1,2-d]-1,3-dithiole-2-ylidene)-4,5-dihydronaphtho [1,2-d]-1,3-dithiole and an anion are useful in forming conductive coatings.

Abstract: Electrophotosensitive materials having the structure ##STR1## is disclosed wherein R.sub.1 and R.sub.2, which may be the same or different, represent a monovalent or divalent substituted or unsubstituted 5 to 13 member heterocyclic nucleus or a substituted or unsubstituted 5 to 10 member saturated or unsaturated carbocyclic nucleus and said hetero atom is selected from the group consisting of O and N;R.sub.3 represents H, alkyl, aryl, or cyano and carboxyesters;m represents 0 or 1;n represents 0, 1, 2 or 3; andsaid substituted R.sub.1 and R.sub.2 substituents are selected from the group consisting of alkyl, hydroxy, phenyl, oxo, benzyl, carbamoyl, acetamido, nitro, piperidinyl, halo, and substituted amino.