抄録
A study was carried out to ascertain whether it was possible to obtain powder images fully available in making original prints for plate making on litho-film bases by means of electrophotographic transferring.
First, a test chart was printed contactly on Electrofax paper, with corona discharged. Then after developing with a magnetic brush to obtain original prints for transferring, the image of the test chart was transferred to on film bases or papers by means of electrostatic transferring and the other by adhesive. The results were examined on their respective density and resolving power to see their practicability for original prints for plate making.
The transferring effect on the film bases was found to be less than that on the art paper, but when adhesive was used, its effect was recognizable to the greater excellent. About the method on film base, a sufficient density in the powder image could not be obtained, but through fixing treatment it was brought within the range of possibility for plate making . Resolving power was different with various transferring methods: 12. 5 lines/mm by the electrostatic method and 16 lines/mm by one using adhesive were obtained.
