| 摘要 |
PURPOSE:To make it possible to vary the color hue of a kind of magnetic dispersion liquid by such an arrangement wherein a liquid is composed by mixing an organic family magnetic dispersion liquid and a coloring agent, and depend on the purpose of use, the rate of mixing of the coloring agent is properly selected within such a range in which the magnetic property of the liquid will not be impaired. CONSTITUTION:A magnetic dispersion liquid wherein fine magnetic particles are dispersed by surface active agents in an organic dispersion medium, e.g. a chemical compound of aliphatic hydrocarbon of C8-20 is mixed with coloring agents of which coloring matters have been treated by an agent for making them soluble or an agent for making them dispersible in advance. As said agent for making substance soluble or agent for making substance dispersible, such an agent having lipophilic groups and functional groups which absorb or combine with coloring matters is used. |
