| 摘要 |
<p>PURPOSE:To obtain a encapsulated magnetic toner hiding the color of the core material and having clear coloring property by forming a core material based on magnetic particles and a layer of an inorg. metallic compd. having a high refractive index. CONSTITUTION:A shell material covering a core material 11 based on magnetic particles is formed as a layer 12 of an inorg. metallic compd. having a high refractive index. One kind of magnetic powder, a mixture of several kinds of magnetic powders or powder consisting of magnetic powder, iron such as ferrite or magnetite, cobalt, nickel and a polymer is used as the core material 11. The pref. refractive index of the inorg. metallic compd. is >=1.9. The core material is dispersed in a dil. soln. of a metallic salt and the inorg. metallic compd. is deposited on the surface of the core material by a precipitation reaction to produce the shell material. The resulting capsulated magnetic toner can be used as an electrophotographic toner, a magneto-graphic toner or magnetic ink for magnetic printing.</p> |
