Abstract: A method and apparatus for processing photographic sheet material, in which the edge of the sheet is attached to a rod having an aerofoil cross-section. Upon passing the rod through processing liquid the liquid flows over the leading edge of the rod and produces turbulence on the face of the sheet which is lying in the plane of the aerofoil. In a reel comprising spaced rods the sheets may overlap and the turbulence will keep them separated. Sheet film may be attached at opposed edges to such rods placed back-to-back. Inner and outer concentric reels may be used, and such reels may carry roll film. A trough for use with developer reels has a longitudinal slot for rapid drainage. In another embodiment a closed tank having an air inlet and a longitudinal air outlet slot controls ambient conditions. In a further embodiment a pair of slotted end discs carry photographic sheet material without supporting rods.