Abstract: A device 10 for drawing a tubular workpiece is provided with a drawing die 20 and a drawing plug 30. The drawing die 20 includes a first curved surface section 1C from which the workpiece 40 is detached while being reduced in diameter, a die bearing section 2B arranged radially inward of and downstream of a workpiece separation point K of the first curved surface section 1C, and a guide section 2D having a second curved surface section 2C which smoothly continues to an upstream end of the die bearing section 2B and configured to again come into contact with the workpiece 40 detached from the first curved bearing section 1C to guide the workpiece to the die bearing section 2B while reducing a diameter of the workpiece 40. The drawing plug 30 has a plug bearing section 3B shorter than a length L4 of the die bearing section 2B. The plug bearing section 3B is arranged at a position corresponding to the die bearing section 2B.

Abstract: A substrate 41 for a photosensitive drum is formed from an uncut metal tube. In an observation visual field 52 in which an image forming surface 41aa of a surface 41a of the substrate 41 is observed in a visual field having an arbitrary size, a total occupancy area ratio of pits having an area ratio of 1 ?m2 or more with respect to the observation visual field area is 2% or more, and the average area per pit having an area of 1 ?m2 or more is greater than 8 ?m2.

Abstract: A device 10 for drawing a tubular workpiece is provided with a drawing die 20 and a drawing plug 30. The drawing die 20 includes a first curved surface section 1C from which the workpiece 40 is detached while being reduced in diameter, a die bearing section 2B arranged radially inward of and downstream of a workpiece separation point K of the first curved surface section 1C, and a guide section 2D having a second curved surface section 2C which smoothly continues to an upstream end of the die bearing section 2B and configured to again come into contact with the workpiece 40 detached from the first curved bearing section 1C to guide the workpiece to the die bearing section 2B while reducing a diameter of the workpiece 40. The drawing plug 30 has a plug bearing section 3B shorter than a length L4 of the die bearing section 2B. The plug bearing section 3B is arranged at a position corresponding to the die bearing section 2B.

Abstract: The step of conducting an anodic oxidation of an aluminum substrate in a sulfuric acid bath, and the further step of conducting an anodic oxidation of the aluminum substrate in an organic acid bath, are conducted in this order, with the organic acid capable of staining the substrate. In this way, an anodized stained membrane having a thickness of 0.5-4 .mu.m is formed on the substrate so as to be covered with a sulfate membrane which is 3-20 .mu.m thick. An evenly roughened interface is provided between the stained membrane and the sulfate membrane in such a state that the light beam incident upon or reflected by the surface of the substrate is refracted in a diffused manner. A photosensitive layer composed of an organic material is formed on the sulfate membrane.