| 摘要 |
PURPOSE:To prepare a document incapable of being recopied without using special processed paper by regulating volume resistivity of toner particles contg. powder having metallic luster to >=10<10>omega.cm. CONSTITUTION:The volume resistivity of toner particles contg. powder having metallic luster is regulated to >=10<10>omega.cm. Powder of a metal or alloy such as mica, Ni, Cu, Al or brass may be used as the powder having metallic luster but powder making the color tone of the toner gold or silver having intense metallic luster is preferably used. The amt. of the powder added is not especially limited and can properly be regulated. A toner for preparing a document incapable of being recopied is obtd. When this toner is used, a copy easy to read can be obtd. |
