A photographic processor and a dryer for drying photographic material. The base has a tin rod adding opening corresponding to the molten tin tank. 1-OH cyclopentane heptanoic acid, 2 heteroarylalkenyl derivatives. However, the electrolytic solution spreads away from the lead wires into the spaces formed around the bases of the lead wires. The tread has shoulder portions disposed at axial outer edges of the tread.