Abstract: A solution containing a water-soluble stilbene sulfonic acid derivative which is used to solubilize oily dye residues in photodeveloper solutions used to develop direct positive silver halide film without generating foam is disclosed.

Abstract: A disposable container in the shape of a bottle made of molded polyethylene plastic serves as a reservoir for a photographic development liquid, that is circulated between the container's reservoir and a machine. The container has large planar sides to which good thermal contact is made by electrical heating pads for the purpose of heating the liquid within the container's reservoir. A substantially planar top surface of the container defines a central outlet aperture. This aperture connects to a feed tube which extends into the container's reservoir. The container is mounted upright to the machine's bottom surface by a screw collar. The machine's bottom surface is complementary to, and mates with, the container's top surface. A fluid-tight compressive seal is made in a first annular region about the container's central aperture by means of an O ring or gasket.