Abstract
It is necessary to choose developers suitable for each kind of electrofax papers to obtain good quality of electrophotographic print. Particulary for the purpose of developing half tone electrostatic images, fine grain development is necessary. The author describes the tested results conceming of various kind of toners, carriers and papers. Tests were achieved on gray scale development, resolution of print, tribo-electricities of materials and development of half tone images, obtaining some concrete data.
