| 摘要 |
PURPOSE:To offer such a two-component developer for electrophotography using a magnetic toner that can maintain good frictional electrification property and causes no picture defects such as splashing, bleeding, etc., by designing a higher density of the magnetic toner in the developer. CONSTITUTION:The two-component developer for electrophotography consists of a negatively (positively) chargeable composite magnetic toner and a magnetic carrier. The composite magnetic toner is obtd. by mixing a magnetic toner (A) and a magnetic toner (B) by 90:10-99:1 mixing ratio. The magnetic powders in the magnetic toner (A) and magnetic toner (B) has such a relative relation that the magnetic powder in the toner (A) is electrified to the negative (positive) polarity because of the frictional electrification series. |
