Abstract: A photopolymerizable composition that is cured with visible light or an infrared laser and is used as a recording layer in a negative planographic printing plate precursor. The photopolymerizable composition is cured by exposure and includes (A) a polymerizable compound that is solid at 25° C. and has at least one radical-polymerizable ethylenically unsaturated double bond in a molecule, (B) a radical polymerization initiator, (C) a binder polymer and, as required, (D) a compound generating heat by infrared exposure.
Abstract: A photographic material is disclosed containing in a non-light sensitive layer above the emulsion layer an anti-sludging compound corresponding to following general formula (I): ##STR1## wherein Ball represents a ballast group, L represents a divalent linking group and Z represents the necessary atoms to close a heterocyclic ring with the proviso that said heterocyclic ring contains no mercapto substituent. The divalent linking group is preferably chosen from the list of --O--, --S--, --CO--NR.sub.1 --, --NR.sub.2 --NR.sub.3 --,--SO.sub.2 --NR.sub.4 --, --O--CR.sub.5 R.sub.6 --CO--NH-- wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 represents hydrogen, alkyl or aralkyl. The heterocyclic ring is preferably chosen from the list of imidazole, benzimidazole, 1,2,3-triazole, 1,2,4-triazole, benzotriazole, tetrazole, indazole, uracil and hydantoin.The non-light sensitive layer, wherein the anti-sludging compound is added, is preferably the top protective layer.
June 1, 1992
Date of Patent:
February 16, 1993
Jean-Marie O. Dewanckele, Emiel A. Hofman
Abstract: The present invention relates to a photographic support comprising, on a substrate, a filling layer comprising a fine solid powder having the stationary diffuse-reflective surface and a color photosensitive material comprising at least one silver halide emulsion layer formed on the secondary diffuse-reflective surface of a filling layer comprising a solid powder formed on a substrate. A photographic support of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shade areas and sharpness. A printing color photosensitive material of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shades and sharpness and also capable of rigid development.
Abstract: Disclosed is a photopolymerizable vehicle and method for the selective photopolymerization of said vehicle by the application of a plurality of different selected wavelengths of energy wherein any single wavelength of energy is inadequate for effecting said photopolymerization. The method comprises sequentially applying a plurality of different selected wavelengths of energy to said vehicle whereby polymerization is effected at the intersection of said wavelengths of energy.
January 23, 1984
Date of Patent:
February 18, 1986
Battelle Memorial Institute
Vincent D. McGinniss, Robert E. Schwerzel