Magnetic toner

Abstract

Abstract PURPOSE: To perform good development independently of types of photosensitive materials to make it possible to perform good transcription onto a plain paper, by mixing and using magnetic toners different in magnetic force and resistance. CONSTITUTION: In respect to the magnetic toner where two or more kinds of magnetic toner different in magnetic force and electric resistance and including at least resin and magnetic powder are mixed, magnetic toner A of saturation magnetic flux density 200W1,200 gauss and electric resistance ≥10 13 Ω.cm for D.C. 4,000V/cm and magnetic toner B of saturation magnetic flux density 1,200W3,000 gauss and resistance ≤10 13 Ω for D.C. 4,000V/cm are mixed. The average particle size of toner B is set to the double or more of the average particle size of toner A, and 1W8pts.wt. toner A is mixed for 10pts.wt. toner B. Coercive force of toner A is set to ≤150 oersted, and coercive force of toner B is set to ≥150 oersted or more. Epoxy resin, acrylic resin, and so on are used as resin. Thus, a toner can be obtained where good transcription onto a plain paper is possible and a good-resolution picture can be obtained. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Masumi Asanae
• 👤 Keitaro Yamashita

Bibliographic Details