Dry Developer of Toner for Electrophotography

The Influence of Ink Concentration and Layer Thickness on Yellow Colour Reproduction in Liquid Electrophotography Toner

Original scientific paper In liquid toner electrophotography, colour gamut is often diminished in the yellow region leading to problems with photo quality prints. It is known that the concentration of pigment particles in the printing ink and its thickness when applied on a paper substrate decisively influence final print quality. Variation of these two parameters for the yellow process ink was...

Clean Carrier Cores for Electrophotography

Most carrier cores for electrophotography are made from Cu-Zn or Ni-Zn ferrites. But in recent years, the use of these materials has been restricted by environmental regulations in many countries. In answer, we have developed clean carrier cores from environmentally iiiendly magnetic materials. One such material is magnetite, which we at FDK Corporation mass-produce by using an original product...

Toner Charge and Environmental Interactions with Toner Adhesion

Understanding charged particle adhesion forces is a critical step in the understanding and modeling of electrophotographic printing processes. Electrostatic and mechanical (Van der Waals) forces are both significant contributors to toner adhesion to substrates, and previous work has shown these to have roughly equivalent magnitudes in modern printer designs. Measuring distributions of toner adh...

Analysis of Ghosting in Electrophotography

A common print quality problem in electrophotographic (EP) printing is ghosting. Ghosting refers to a vestigial image repeated at regular intervals down the length of a page and appearing as light or dark areas (negative or positive ghosting, respectively) relative to the surrounding field. There are many sources of ghosting, including most EP printer subsystems and many of their components. Su...

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