Abstract
Many types of toner charge spectrometers have been designed because the measurement of toner charge distribution in an electrophotographic development system would be useful in evaluating and optimizing the system. However, some charge spectrometers cannot accurately measure the charge distribution; moreover, it is difficult to collect the toner particles classified by charge. We designed and manufactured a charge spectrometer using electrostatic field and gravity without air flow, which can classify the toner particles into different specific charge groups. The toner particles were analyzed by the particle analyzer measuring the composition and size of toner and additives. The analysis of a single-component toner showed that smaller sized toners with a large amount of additives resulted in a highly charged toner. The analysis method using the charge spectrometer and the particle analyzer together is very useful for studying the mechanism of toner charging and for producing a high-quality toner.
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