A non-magnetic one-component developer suitable for use in a contact or non-contact development system. The developer comprises 100 parts by weight of colored fine particles, which comprises a binder resin and a colorant, and 0.3-10 parts by weight of at least one fine inorganic powder selected from (i) a fine inorganic powder (I) obtained by subjecting a fine inorganic powder having an average particle size of 0.1-10 mu m and a heating loss (under drying conditions of 150 DEG C and 1 hour) of at most 1 wt.% to a hydrophobicity-imparting treatment with a silicone oil and (ii) a fine inorganic powder (II) obtained by subjecting a fine inorganic powder having an average particle size of 0.1-10 mu m to a two-step hydrophobicity-imparting treatment with at least one compound selected from silane coupling agents and silazane compounds and then further with a silicone oil.
申请公布号
EP0438245(A2)
申请公布日期
1991.07.24
申请号
EP19910300232
申请日期
1991.01.14
申请人
NIPPON ZEON CO., LTD.;OKI ELECTRIC INDUSTRY CO., LTD.