Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photoconductive layer formed on the substrate and including a novel disazo compound as a charge generating layer. The disazo compound is represented by the following general formula: ##STR1## wherein X1 stands for one of an alkyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted, X.sub.2 stands for one of a hydrogen atom, a cyano group, a carbamoyl group, a carboxyl group, an ester group and an acyl group, each of X.sub.3 and X.sub.4 stands for one of a hydrogen atom, a halogen atom, a nitro group, an alkyl group and an alkoxyl group, both of last two groups may be or not may be substituted, Z stands for one of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted and --N.dbd.N--D--N--N.dbd.N-- stands for a disazo residual group.

Abstract: A photosensitive member for electrophotography has a photosensitive layer provided on a conductive layer. The photosensitive layeer contains a hydrazone compound represented by the following general formula (I): ##STR1## wherein R.sub.1 stands for an aryl group which may have a substituent(s); each of R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 stands for a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group, an allyl group, an aryl group which may have a substitutent(s), or an aralkyl group; and n stands for an integer of 0 to 1.

Abstract: An electrophotographic photosensitive material includes a photosensitive layer containing a charge transporting substance comprising a novel hydrazone compound or derivative. A hydrazone compound is represented by the following general formula: ##STR1## wherein R.sub.1 stands for an aryl group which may have a substituent(s); each of R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 stands for a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group, an allyl group, an aryl group, or an aralkyl group, both of which aryl group and aralkyl group may have a substituent(s); and n stands for an integer of 0 or 1.

Abstract: The photoconductor for electrophotography comprises a novel hydrazone compound as a charge transporting substance. The hydrazone compound is represented by the following general formula: ##STR1## wherein, R.sub.1 stands for a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group or a nitro group, each of R.sub.2, R.sub.3 and R.sub.4 stands for an aryl group, an alkyl group, an aralkyl group, each of which may have a substituent(s), and at least one of R.sub.2, R.sub.3 and R.sub.4 stands for a thenyl group which may have a substituent.

Abstract: The photoconductor for electrophotography comprises a novel amino compound as a charge transporting substance. The amino compound is represented by the following general formula: ##STR1## wherein, R.sub.1 stands for one of a hydrogen atom, a halogen atom, an alkyl group, a hydroxy group and an alkoxy group, each of R.sub.2, R.sub.3, R.sub.4 and R.sub.5 stands for one of an alkyl group, an aryl group, a thienyl group, an aralkyl group and an alkenyl group, each of which groups may be or not may be substituted and further at least one of R.sub.2 and R.sub.3 stands for thenyl group and n stands for an integer of 0, 1 or 2.

Abstract: A photoconductor for electrophotography comprising a novel hydrazone compound or derivative as a charge transporting substance. A hydrazone compound is represented by the following general formula: ##STR1## wherein, each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 stands for a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group, an allyl group, or an aryl group which may have a substituent(s) or an amino group which may have a substitutent(s); and n stands for an integer of 0, 1 or 2.

Abstract: A method for the formation of a light-shield coat on a peripheral area of an optical lens other than the effective aperture area, which method is constituted by the steps of mounting the lens on a rotatable lens support means effective to rotate the lens about the optical axis thereof with the peripheral area positioned exteriorly of the lens support means, applying to the peripheral area of the lens a photo-setting, black-colored light shielding paint capable of hardening when exposed to ultraviolet rays to form the light-shield coat on the peripheral area of the lens, and radiating ultraviolet rays onto the peripheral area of the lens, while the latter is rotated, to cause the light-shield coat to harden.

Abstract: Refractory furnace wall coating composition comprising from about 45 to about 65% by weight of silicon carbide, from about 10 to about 15% by weight of stabilized zirconium oxide or bentonite, from about 5 to about 10% by weight of silicon dioxide, from about 3 to about 5% by weight of hydrolyzate of poly(ethyl silicate), from about 10 to about 20% by weight of sodium silicate or aluminum phosphate, the balance being water, is disclosed.