Abstract: Light-sensitive compounds are described which have the formula ##STR1## wherein R.sup.1 and R.sup.2 denote H or alkyl, R.sup.3 and R.sup.4 denote H or 4,6-bis-trichloromethyl-s-triazin-2-yl, R.sup.5 and R.sup.6 denote H or halogen, alkyl, alkenyl or alkoxy, and Ar denotes a mononuclear to trinuclear aromatic group.These compounds are suitable as photoinitiators for free-radical polymerizations or as photolytic acid donors for acid-cleavable compounds, and for cross-linking and color formation reactions. They are distinguished by a high sensitivity in various spectral ranges.

Abstract: Polyol(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate), containing 1,4-dihydroxy anthraquinone in amounts sufficient to selectively absorb at least 94 percent of the visible and ultraviolet light segments of the electromagnetic spectrum below 530 nanometers is described. Also described are ophthalmic articles prepared by curing the monomer.

Abstract: An optical transmission radiation filter absorbing between 320 and 500 nm comprises a polymeric film having a benzylidene or naphthalamide dye in combination with a phenol-formaldehyde resin which shifts the absorbing wavelength of the dyes.

Abstract: Hydrazone derivatives of the formula ##STR1## in which A.sub.1 is an aromatic radical, B.sub.1 is hydrogen, alkyl, cycloalkyl, aralkyl or aryl, R.sub.1, R.sub.2 and R.sub.3 independently of one another are alkyl, cycloalkyl, aralkyl or polyoxyalkylene, Z.sub.1 is arylene, X.sup..crclbar. is an anion and m is 0, 1, 2 or 3.The hydrazone derivatives are suitable as UV absorbers, especially in polymer coatings.

Abstract: A silver halide photographic light-sensitive material is disclosed. The material is comprised of one or more light-sensitive silver emulsion layers and one or more light-insensitive layers. The silver halide layers or light-insensitive layers contain an ultraviolet ray absorbing polymer latex. The polymer latex is comprised of a homopolymer or copolymer having a repeating unit derived from monomers represented by the following general formula (I): ##STR1## wherein the substituents within a general formula (I) are defined within the specification. The polymer latex (I) contains a substituents Q which represents an ultraviolet ray absorbing group represented by the general formula (II): ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.

Abstract: Solutions of 2,7-dimethyl-diaza-(3,6)-cycloheptadien-(1,6)- perchlorate are used as liquid band pass filters for the transmission of U-V.