| 摘要 |
PURPOSE:To obtain an excellent image having no white absence by setting the content number of toner of more than a specific particle side to less than a specific value. CONSTITUTION:If toner contains many large particles 5, the large particles cause copy paper 3 to float to weaken an electric field produced by a transfer charger 4 at peripheries of the particles 5, and toner particles nearby the particles 5 are not transferred, so >=10 particles 5 of >=30mum particle size are inhibited from being incorporated in about 1g toner, preventing white absence. When whether there are particles of 30mum or not, inspection by a microscope and a coal tar counter is insufficient and a grind gauge is used preferably. Thus, an excellent image having no white absence is obtained all the time. |
