Electrophotographic toner set, image forming apparatus, and image forming method

Abstract

Provided are an electrophotographic toner set capable of preventing toner particles flying apart, preventing poor development and maintaining a certain image concentration free of the influence of a printing environment or keeping the electric charge of the toner in a certain amount even though repeated printing is performed, an image forming apparatus, and an image forming method. The electrophotographic toner set includes a developer toner and a replenishment toner. The developer toner and the replenishment toner each include toner particles, and silica particles and titania particles provided on the surfaces of the toner particles. The silica particles have a BET specific surface area of 15 to 95 m<2> / g and are surface-treated with a silicone oil. The relationship between the content ofthe silica particles of the developer toner and the content of the silica particles of the replenishment toner, and the relationship between the content of the titania particles of the developer toner and the content of the titania particles of the replenishment toner each have particular values.

Description

technical field [0001] Embodiments of the present invention relate to a toner set containing toner for electrophotography, an image forming device, and an image forming method using the same. Background technique [0002] As a conventional image forming method, there is used an electrophotography method in which an electric latent image is formed on an image carrier, and then the latent image is developed with a toner. After developing the above-mentioned latent image, the toner image is transferred onto a transfer material such as paper, and then fixed by heating, pressing, or the like. The toner used here is not limited to the conventional monochrome black, but also toners of various colors are used to form an image in order to form a color image. [0003] Toner particles used in electrophotography need to maintain a certain preferred charge amount. When the charge amount of the toner is lower than the above-mentioned predetermined preferable charge amount, the toner par...

AI Technical Summary

Problems solved by technology

When the charge amount of the toner is lower than the above-mentioned certain preferred charge amount, the toner particles may scatter from the developer, and may become denser than the target image density at the time of printing, or cause fixation failure

However, since the carrier in the developer deteriorates as the number of sheets used for the image forming apparatus passes increases, the charge amount of the toner tends to decrease.

In addition, in a humid environment, the amount of moisture adhering to the toner particles increases, and the moisture in contact with the toner particles may cause the charge leakage of the toner particles and reduce the charge amount.

Images