| 摘要 |
<p>PURPOSE:To prevent the deterioration of image quality such as thereof an roughness image and the increase of fogging from occurring even at a repeated developing time by respectively specifying volume averaged grain size, the number proportion of grains having specified grain size, proportion by volume and the standard deviation of volume grain size distribution. CONSTITUTION:This non-magnetic one-component developer is constituted so that the volume averaged grain size thereof is specified to be 7.0-12.0mum and the number proportion of the grains whose grain size is <=5mum is specified to be <=13.0 pieces %, the proportion by the volume of the grains whose grain size is <=16mum is specified to be 2.0 volume % and the standard deviation of the volume grain size distribution is specified to be <=2.7. After the developer is supplied to a developing roller 11 and the thin layer of the developer 5 is formed on the surface of the roller 11 by using a developer layer regulation blade 15 pressed to the roller 11 by linear load being 40-100g/cm, the developer 5 is supplied to an electrostatic latent image on a photoreceptor drum 9 provided so as to be proximately faced to the roller 11 and the electrostatic latent image is developed. Thus, the deterioration of the image quality such as the fogging on the drum 9 and the image and the roughness of the image is prevented from occurring even at the repeated developing action time because of continuous use.</p> |
