抄録
The image density and fog density of ZnO electrofax paper are related with the surface potential given by the corona charging, that is, the image density is effected only by the initial surface potential just after the charging, but the fog density is not only to be effected by the surface potential discharged in illuminating, but also the initial surface potential just after the charging.
Therefore in order to clarify these relations, the experiments were carried out, varied initial surface potential and discharged surface potential, being fixed developer, developing process, (magnetic brush method) electrofax paper.
Data of this experiment were shown in Fig. 1~7
An empirical formula was given by the experimentation, that is,
(1)
(2)
(3)
where,
D1: Non-illuminated density
D2: Illuminated density (Fog density)
⊿
V: Difference between the initial surface potential and the illuminated surface potential.
V0: Illuminated surface potential.
k1,
k2,
k3: Constant parameter decided by the experimental data.
The fog density has the term which is not related with surface potential, and related with the root of surface potential, and the difference between the initial surface potential and discharged surface potential.
