| abstract |
A toner composition of electrostatically attractable fusible powder particles suitable for fixing with simultaneous heat and pressure, having a melt viscosity at 140 DEG C. in the range of 105 to 106 mPa.s, an average particle size in the range of 1 to 50 mu m, and comprising a coloring substance and more than 80% of their volume of a mixture of: a combination of fumaric-bisphenolic and fumaric, propoxylated bisphenolic polyester resins, a sterically-hindered phenol release agent, and a melt-viscosity controlling pigment e.g. barium sulphate. |