PURPOSE: To improve the electrostatic coating property, deposition efficiency on a metal to be coated, and retainability after deposition of the subject powder without deteriorating the characteristic of a glazed surface by coating the surface of inorg. powder with a thermally decomposable org. material.

CONSTITUTION: 100pts.wt. of the inorg. powder, appropriately frit for producing enamel, other ceramic powder for producing ceramics, and metal powder in certain circumstances is coated with 1W30pts.wt., or preferably 3W25pts.wt., thermally decomposable org. material to obtain composite powder for powder coating. A thermally decomposable org. material, which can be completely thermally decomposed and dissipated without leaving any carbon in the course of calcination at a temp. preferably more than 100°C lower than the calcination temp., is used, and polymethyl methacrylate, etc., can be exemplified. The org. material is advantageously added to coat the inorg. powder, when inorg. mate rial is milled to a specified particle size. The calcination after coating is carried out at 700W920°C in case of an enameled steel sheet and at 500W600°C in case of an aluminum sheet.