Carrier for use in electrophotography, two component-type develo

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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430108, 430122, 252 6258, 252 6263, G03G 9107

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active

055761330

ABSTRACT:
A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 30 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, a magnetization (residual magnetization .sigma..sub.r) of at least 25 emu/cm.sup.3 under a magnetic field strength of zero oersted, a coercive force of less than 300 oersted, and a relationship of:

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Database WPI, Week 9043, Derwent Publ., AN 90-323347 (43) of JP 2-223962, Sep. 6, 1990.

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