TONER, DEVELOPER AND IMAGE FORMATION DEVICE Russian patent published in 2015 - IPC G03G9/08 G03G9/87 G03G9/10 

FIELD: printing.

SUBSTANCE: toner contains particles of toner base and the surface additive. All particles of the toner base contain binding pitch and anti-adhesive agent. The surface additive contains the non-spherical joined particles, in each of which the primary particles are joined together. The joined particles satisfy to the following formula (1): (Nx/1000)×100≤30%, where Nx is a number of primary particles which are presented separately, with reference to 1000 joined particles observed under the scanning electronic microscope after mixing of 0.5 g of the joined particles and 49.5 g of the carrier placed in the flask 50 ml within 10 minutes by means of the mixing and stirring device at 67 Hz.

EFFECT: obtaining of durable toner capable to cleaning, stable at storage, with high density of image and ability to transfer at high-speed formation of full-colour image.

10 cl, 2 tbl, 9 dwg, 55 ex