Abstract: A heat-sensitive recording material comprises a recording layer containing a colorless or light-colored basic dye and a developing agent on a support. The recording layer further contains a polyethylene having a melting point not lower than 60.degree. C., which is obtained as an emulsion not comprising a surfactant.The heat-sensitive recording material may be prepared by coating on a support an aqueous coating composition, which contains a colorless or light-colored basic dye and a developing agent together with a polyethylene emulsion comprising a polyethylene having a melting point not lower than 60.degree. C. but no surfactant (e.g. emulsifier), to form a recording layer.

Abstract: An electrophotographic material having an enhanced sensitivity to laser rays comprises,(A) an electroconductive substrate, and(B) a laser-sensitive electrophotographic layer comprising (a) a finely divided photoconductive zinc oxide, (b) a resinous binder, (c) a sensitizing coloring material comprising at least one member selected from the compounds of the formulae (I) and (II): ##STR1## in which m.sup.1, m.sup.2, n.sup.1 and n.sup.2 are 1 to 8, R.sup.1 and R.sup.2 are --COO or --SO.sub.3, R.sup.3 and R.sup.4 are H, --CH.dbd.CH.sub.2 --COOH, --SO.sub.3 H, --COONa, --SO.sub.3 Na, COOK or --SO.sub.3 K, X is Cl, Br, I or --ClO.sub.4, ##STR2## and, (d) a sensitizing assistant comprising at least one carboxylic anhydride of the formula (III): ##STR3## wherein R.sup.5 and R.sup.6 are H, C.sub.1-8 alkyl or phenyl.

Abstract: A composition useful for rapidly and safely effecting a fat-desensitizing treatment for litho printing plates with a high efficiency, and for providing a hydrophilic membrane having a high durability in printing operations on the surfaces of the litho printing plates, comprises (A) a phytic acid or its functional derivative; (B) a metal salt of the formula MX.sub.