A wafer is supplied from a wafer cassette to an etching part by a wafer transport robot so as to be etched. The non-magnetic monocomponent color toner composition of the present invention is prepared by coating organic particles having an average particle size of 0. The image frames are rotated relative to one another. Each engine winch has an associated engine cable operably connected thereto. The lever has an inclined surface and a latch driving convex portion serving as an engagement releasing portion adapted to release engagement between the latch and the locking stepped portion by sliding of the lever, and a support piece continuous from the latch driving convex portion, folded back, and supported by the housing. In another non-limiting embodiment, the transparency includes a major surface of the substrate having pyramidal tetrahedrons to capture light waves within the body of the substrate to reduce the percent of visible light reflection.