| 摘要 |
A developer of a mixture of carrier particles and toner particles containing at least one binder, at least one colorant, and optionally one or more additives, has a triboelectric value of from 35 to 60 muC/g, a charge distribution (Q/D) of from -0.5 to -1.0 fC/mum and the distribution is substantially unimodal and possesses a peak width of less than 0.5 fC/mum, preferably less than 0.3 fC/mum, and a conductivity of the developer ranges from 1x10-11 to 10x10-15 mho/cm as measured at 30 V. The carrier particles of the developer preferably have an average particle diameter of 65 to 90 microns and a size distribution wherein 2.0% or less of a total number of carrier particles have a size less than 38 micrometers. The ratio of carrier volume median diameter to toner volume median diameter is about 10:1. The developer finds particular use in devices utilizing hybrid scavengeless development. Use of a developer with such properties in a hybrid scavengeless development apparatus enables images to be achieved with properties similar to that achieved in offset lithography.
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