抄録
The influence of components of ZnO papers on characteristics of image developed by the magnetic brush method under controlled conditions was investigated.
Chatacteristics of image density vs. surface voltage were affected not only by types of Zn Olayers but also by those of supports, according to the following experimental formula.:

where D is image density,
V is surface voltage,
Vc is critical voltage which represents minimum surface voltage being necessary to obtain appreciable image, and
k and
n are parameters depending on ZnO layers and supports.
In this formula the value of Vc was affected rather by the support than by the ZnO layer.
From the D vs. log E characteristics, it was found that halftone rendition was influenced strikingly by components of ZnO layers and slightly by those of supports.
Above results suggested that the ZnO layer-support barrier played an impotant role in the image formation.