Typo: A Monthly Newspaper and Literary Review, Volume 4
Luminous Powder.—
Luminous Powder.—
This invention is described in the American Lithographer and Printer, and is a decided novelty. The material is applied in exactly the same manner as bronzes, and in daylight has merely the appearance of a white powder; but if exposed to the light, the design becomes luminous in the dark, and will shine all night. Advertisers ought to recognize the applications of this novelty.