Patent ID: 8669031

Claim:
An electrophotographic photoreceptor comprising a cylindrical conductive substrate having been finished via cutting processing while varying a tool bit transfer speed, a number of revolutions of the conductive substrate, or both of them during a single cutting process, and provided thereon, a photosensitive layer, wherein among lag peaks excluding the lag peak of 0 in a correlogram of a surface profile of the substrate in a direction along a central axis of the substrate, the three tallest peaks have a mean value in height of 0.3-0.9, the height expressed as an autocorrelation coefficient, where the correlogram is a correlogram obtained by plotting results from which an autocorrelation coefficient between a base zone of a certain observation result and a target zone having the same number of data as in the base zone is calculated, while displacing the target zone, and lag in the target zone and the autocorrelation coefficient are plotted on a horizontal axis and a vertical axis, respectively; and when there is the same number of two numerical sequence data a correlation coefficient is a value obtained by dividing a mean value of covariance of the two numerical sequence data with the product of each standard deviation, and a correlation coefficient calculated among partial data within certain numerical sequence data is designated as an autocorrelation coefficient.