| 摘要 |
<p>PURPOSE:To stabilize electrostatic charging for a toner so as to obtain a good quality picture by humidification treating metallic acid beforehand adding. CONSTITUTION:Metallic oxide treated by humidification beforehand is added to toner particles additionally. Metallic oxide humidifically treated at a temp. >=50 deg.C by supplying humidified gas containing >=5wt. water is preferable and added quantity of metallic oxide is preferable to be 0.01-10wt. part to 100wt. part of a toner. By this humidification treating, surface of the metallic oxide become to be weak in hydrophilic property. As a usable metallic oxide, such as oxide of aluminum, titanium, being a flowability granting agent is cited and a metallic oxide treated for conversing to hydrophobicity is more preferable in stability of electro-static charge at high humidity circumstance.</p> |
