Oce-technologies B.v.

Marcel Dialma Everaars

Peter Maria Cornelis Zeelen

Ronald Michael Josef Hofstra

Huibert Cornelis Kwint

Marcella Coppenrath

A toner comprising separate toner particles each of which comprises a fixable core, the core being provided with a conductive surface layer containing a doped electrically conductive polymer and an intermediate layer, particularly a polymer-containing intermediate layer disposed between the surface layer and the core.

Toner coated with conductive polymer

A colored powder, particularly a toner powder, containing a thermoplastic resin, a fluorescent dye, possibly a magnetically attractable material and a compound of a metal of which an ion is diagmagnetic. The metal is, for example, calcium, silver, sodium, potassium, barium, aluminium, zirconium, zinc or magnesium. The metal compound is preferably a metal salt and is preferably present in the colored powder in a quantity of between 2 to 15% by weight. Advantageously, the metal compound is dissolved in the thermoplastic resin (or mixture of thermoplastic resins) or be very finely distributed therein. Metal salts, particularly zinc and magnesium salts, of aliphatic, possibly branched carboxylic acids, particularly carboxylic acids having a hydrocarbon radical with at least six carbon atoms, are preferred. The addition of the metal compound reduces extinction of the fluorescence of the fluorescent dye.

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Grashoek, Netherlands

Marcel Dialma Everaars