A film having a metallic luster is easier to manufacture and exhibits little degradation over time, an article having the film formed thereon, and a manufacturing method for the film having a metallic luster. The film, which has a metallic luster, according to one aspect of the present invention, is characterized by containing a thiophene polymer. The manufacturing method for the film which has a metallic luster, according to another aspect of the present invention, is characterized by a thiophene being polymerized using an oxidizing agent and made into a solution containing the thiophene polymer, and then coating and drying the solution containing the thiophene polymer on an article. The article having the film which has a metallic luster formed thereon, according to another aspect of the present invention, is characterized by containing a thiophene polymer.

A film having a metallic luster is easier to manufacture and exhibits little degradation over time, an article having the film formed thereon, and a manufacturing method for the film having a metallic luster. The film, which has a metallic luster, according to one aspect of the present invention, is characterized by containing a thiophene polymer. The manufacturing method for the film which has a metallic luster, according to another aspect of the present invention, is characterized by a thiophene being polymerized using an oxidizing agent and made into a solution containing the thiophene polymer, and then coating and drying the solution containing the thiophene polymer on an article. The article having the film which has a metallic luster formed thereon, according to another aspect of the present invention, is characterized by containing a thiophene polymer.

A heating cooker includes: a top plate on which a cooking container to be heated is placed; an outer case as a main body having an upper surface on which the top plate is placed; a heater heating the cooking container; and a light emitting device disposed in the outer case, for displaying the heating state. The top plate includes: a glass substrate having a transparent light-transmitting low-expansion crystallized glass made mainly of Li.sub.2OAL.sub.2O.sub.3SiO.sub.2 and having -quartz solid solution, having a crystal size smaller than the wavelength of visible light; a design layer having a black-based color disposed on an undersurface of the glass substrate; a diffusion region disposed partially on an undersurface of the design layer, for diffusedly emitting light from the light emitting device; and a light-blocking layer disposed on the undersurface of the design layer other than the diffusion region, for blocking light from below.

A heating cooker includes: a top plate on which a cooking container to be heated is placed; an outer case as a main body having an upper surface on which the top plate is placed; a heater heating the cooking container; and a light emitting device disposed in the outer case, for displaying the heating state. The top plate includes: a glass substrate having a transparent light-transmitting low-expansion crystallized glass made mainly of Li.sub.2OAL.sub.2O.sub.3SiO.sub.2 and having -quartz solid solution, having a crystal size smaller than the wavelength of visible light; a design layer having a black-based color disposed on an undersurface of the glass substrate; a diffusion region disposed partially on an undersurface of the design layer, for diffusedly emitting light from the light emitting device; and a light-blocking layer disposed on the undersurface of the design layer other than the diffusion region, for blocking light from below.