ELECTROPHOTOGRAPHIC ORGANIC PHOTORECEPTOR AND METHOD FOR DISCRIMINATING ITS DURABILITY

摘要

PROBLEM TO BE SOLVED: To provide an electrophotographic org. photoreceptor which does not induce the local little fracture of a photosensitive layer and a method for discriminating its durability. SOLUTION: The surface of the photosensitive layer of the electrophotographic org. photoreceptor having the org. photosensitive layer contg. a photoconductive material on a conductive substrate 1 as a test surface is subjected to a method for evaluating and testing elastic force which applies perpendicular load on a conical presser of hemispherical diamond or sapphire of a conical angle of 90 deg.C and 0.01mm in the diameter of its front end and moves this pressure along the test surface at a speed of 30mm/min. The photoreceptor having such elastic force that the change in the width of a scratching flaw is <=20μm at every 10g change in the perpendicular load at the perpendicular load of >=10g is decided to be nondefective.