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COLOR TONERS RENDERED MAGNETICALLY RESPONSIVE BY SPRAY DRYING TECHNIQUE

IP.com Disclosure Number: IPCOM000024221D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 47K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is single-component, magnetic developer primarily for use in colored xerographic toners. One problem that exists is that should color xerography be desired, the dark or black color of the magnetic particles interferes with the color of the pigments or dyes employed to obtain accurate color reproductions.

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(EROX DISCLOSURE JOURNAL

COLOR TONERS RENDERED MAGNETICALLY RESPONSIVE BY SPRAY DRYING TECHNIQUE Charles G. Dickerson

Proposed Classification
U.S. Cl. 427/127 Int. Cl. B05d 5/12

Peter F. Erhardt
Richard J. Hodgson

Disclosed is single-component, magnetic developer primarily for use in colored xerographic toners. One problem that exists is that should color xerography be desired, the dark or black color of the magnetic particles interferes with the color of the pigments or dyes employed to obtain accurate color reproductions.

It is proposed to coat conventional colored xerographic toners with carbonyl iron, which is both magnetic and light in color and will not interfere with the color of the base toner, by spray drying a dispersion of the colored toner particles and the carbonyl iron particles in a solution of a dissolved resin in a solvent.

An additional advantage of this method is that the magnetic particles are present on the surface of the toner particle where it has the greatest response to magnetic fields.

Volume 4 Number 6 November/December 1979 817

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November/December 6 Number 4 Volume XEROX 818 DISCLOSURE JOURNAL 1979

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