| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive photoreceptor drum substrate which can be easily made light in weight without causing the reduction of mechanical strength, workability and dimensional accuracy, etc., and which contributes to low power consumption. SOLUTION: As for the cylindrical photoreceptor drum substrate constituting the substrate of the photoreceptor drum used at an electrophotographic process, the weight with reference to the volume of the whole cylindrical substrate including a hollow part is controlled to be >=0.2 g/cm3 and <0.65 g/cm3. |
