| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder used for a color ink, an ink, a color filler for plastic and paper, a color toner, a color ink for an ink jet printer, an ink and a toner for preventing forgery, and the like, for a printed matter, a copy, a coating material, and a filling material (filler), particularly for objects that need to be prevented from forgery, such as stocks and bonds, cards, identification papers, documents for certifying the person, and official documents, and a process for producing the powder, and a coloring material composition. SOLUTION: The powder has spectrophotometric characteristics having a reflection peak or a transmission absorption bottom in an ultraviolet or infrared region. It can be produced by providing multiple coating films on a base particle so as to give the above spectrophotometric characteristics. A coloring material composition containing the powder is effective in preventing forgery. |
